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Basic Math/Questions Answered by Expert Josh
| Subject | Date Asked |
| fractions | 5/18/2011 |
| Q: what is half of 2 and 1/3 cups of water A: We can do this in two ways. Method 1: Combine 2 and 1/3, converting this quantity into an improper ... | |
| Dilute | 5/13/2011 |
| Q: http://www.sciencebuddies.org/science-fair-projects/project_ideas/OceanSci_p003.shtml?fave=no&isb=cm ... A: Ashley, To keep track of how much salt is in each cup, let the initial concentration of the stock ... | |
| Another twist to the golf pairing question | 5/9/2011 |
| Q: Came across your answer after a lot of stumbling around on the web. We have a total of 12 players ... A: I didn't try anything fancy. I set some constraints and played around with different combination in ... | |
| Equation of a Line Parallel to a Given Line through Given Points | 5/7/2011 |
| Q: Help with solving (4,-4)3x-5y=8 A: Tracy, First, rearrange 3x-5y=8 into the standard form y=mx+b ....[1] Step 1: 5y=3x-8 Step 2: ... | |
| Inverses | 5/4/2011 |
| Q: What is the inverse of the number 1? How is its inverse determined? I thank you for your reply. ... A: Kenneth, There is nothing wrong as far as I can see. Yes, (1/2) is the multiplicative inverse of 2. ... | |
| quadratic equations | 5/3/2011 |
| Q: Jenny is y^2 yrs old and her daughter allyson is y yrs old. if jenny lives to the age of 13y ... A: To solve this problem, let us deal with each piece of information one by one. Our objective is to ... | |
| maths-substitution into formula | 4/19/2011 |
| Q: (A)find the value of f if 1/u + 1/v =1/f,u =5 and v=3. A: To find the value of f, we can first plug in the values for "u" and "v" on the left hand side of the ... | |
| question of application problems | 3/17/2011 |
| Q: Sean is deciding whether to select a satellite receiver or cable for his television programming. The ... A: The unknown quantity here is the number of months it takes to achieve break even; let this be X. ... | |
| Finding equations | 3/4/2011 |
| Q: I have not worked on finding math equations based on some logic for many years. I would like to seek ... A: Regarding the first approach, the simplest way of following the sequence is to execute the following ... | |
| Probability | 3/2/2011 |
| Q: and 999 people pull beans from the jar, what is the probability of one person pulling the green ... A: To answer this problem, we can ask the opposite question, what is the probability that no one pulls ... | |
| combinations/permutations | 2/28/2011 |
| Q: I was having difficulty understanding how to calculate some percentages dealing with combinations ... A: You are right in so far as "adding up the probabilities of drawing one/two/three and four aces" is ... | |
| metric system measurement | 2/24/2011 |
| Q: eighty grams of grass seed are used every 100 m^2 of lawn. how many kilograms of grass seed are ... A: Assuming the contents in each bag cannot be rearranged, here is the answer. To picture what is ... | |
| metric system measurement | 2/23/2011 |
| Q: eighty grams of grass seed are used every 100 m^2 of lawn. how many kilograms of grass seed are ... A: Birdie, Assuming the units are the same, 2000 m^2 [square meters] is 20 times larger than 100 m^2 ... | |
| math | 2/22/2011 |
| Q: A student had 100 coins totaling $5.00. He had no nickels. What coins did he have if 60% of the ... A: I think this problem has no solution. There is something wrong with the numbers. As a sanity check, ... | |
| Percentages | 2/9/2011 |
| Q: John is a salesman and he earns 16.5% of his sales. If John earned $54.45 last month, what was the ... A: First, let the unknown (in this case, the total of his sales) be X. The amount he earned (A) is ... | |
| algebra | 2/1/2011 |
| Q: Find the solutions of (ax+b)(cx+d)=0 A: We treat this question the same way as we would with numbers. Imagine you are looking at the product ... | |
| Real Estate Math | 1/28/2011 |
| Q: If the interest on a loan at 11% per annum for four months is $42,625.00 what is the amount of the ... A: An interest rate of 11% p.a. is equivalent to 0.11 when written in decimal form. We have to divide ... | |
| Annual Percentage Yield | 1/27/2011 |
| Q: Is there another method that can be used to determine the annual percentage yield other than by the ... A: I want to understand what you mean when you said "another method that can be used to DETERMINE the ... | |
| Compound Inequalities Word Problem | 1/26/2011 |
| Q: I am having trouble with the formation of the inequality and which numbers to use to solve this ... A: The key to this is finding an expression for the final course average. Normally, a simple average is ... | |
| Annual Percentage Yield | 1/26/2011 |
| Q: Is there another method that can be used to determine the annual percentage yield other than by the ... A: Kenneth, Anything else that you can find must in the end reconcile with this expression, if this is ... | |
| Math | 1/20/2011 |
| Q: Business-markup policy: A drugstore sells a drug costing $85 for $112 and a drug costing $175 ... A: In the first question, we have been given essentially two data points which lie on a straight line. ... | |
| Direct & Indirect Proportions | 1/19/2011 |
| Q: I want to change this direct proportion into an indirect proportion and solve for the answer: 40 ... A: I do not see any real difference between what you called "direct proportion" and "indirect ... | |
| Direct & Indirect Proportions | 1/19/2011 |
| Q: I want to change this direct proportion into an indirect proportion and solve for the answer: 40 ... A: Kenneth, Re: "Does 1/100 of wire weigh (1/65) pounds and does (1/40) of wire weigh (1/26) pounds?" ... | |
| Annual Percentage Yield | 1/6/2011 |
| Q: The compound interest calculation is p(1 + r)^n. This calculation is a simplified calculation of (p ... A: Your original question asks what (1 + periodic rate)^n becomes, not where it comes from. These are ... | |
| series | 1/5/2011 |
| Q: 1.find the sum to n terms of 8,88,888,8888...... ... A: Tricky questions. Here are the answers. I don't know what comments are appropriate to add, as you ... | |
| Annual Percentage Yield | 1/5/2011 |
| Q: The compound interest calculation is p(1 + r)^n. This calculation is a simplified calculation of (p ... A: Kenneth, You said "Thanks for the complex reply, but you did not answer my question." Quite the ... | |
| Percent-Day Interest Method | 12/10/2010 |
| Q: I read about this method in an old business mathematics book and was curious about how it works to ... A: Kenneth, If you attach specific words to numbers, it will confuse you more than anything. There is ... | |
| Percent-Day Interest Method | 12/9/2010 |
| Q: I read about this method in an old business mathematics book and was curious about how it works to ... A: I agree with you. I personally would not use this calculation too. The interest may be calculated in ... | |
| math | 12/8/2010 |
| Q: if the same amount of steel used to create 8 steel balls with a radius of 1 inch each is used to ... A: Cynthia, The total volume of material used remains constant. This is the key. Recall the equation ... | |
| Write in scientific notation and multipy the approximate numbers | 12/7/2010 |
| Q: Write in scientific notation and multipy the approximate numbers. 682,000 x 0.00024 = I got (6.82 ... A: You have already written the expression in scientific notations...that is good. The next step is to ... | |
| Simple & Weighted Averages | 12/2/2010 |
| Q: I am curious to know how to determine the weighted average of the following by using a simple ... A: The word "averaging" refers to the process of adding up terms and dividing by the number of terms. ... | |
| Basic Maths (Quadratic Equations) | 12/1/2010 |
| Q: The area my son is struggling with is in the completion of the squares. Just need the basic rules. ... A: This question may be answered in general using pure algebra. However, I am not sure how useful this ... | |
| prime factorization | 12/1/2010 |
| Q: what is the prime factorization of 490? in "tree form". thanks. A: The theory states that all positive integers may be written as a product of prime numbers. The way ... | |
| trying to solve a practice question before i test | 7/24/2010 |
| Q: The owner sold a property for $200,000.00 paid off a existing loan for $120,000.00 had closing cost ... A: Lawrence, It comes down to the meaning of "net". We both interpreted "net" as "net gain". So, it ... | |
| trying to solve a practice question before i test | 7/23/2010 |
| Q: The owner sold a property for $200,000.00 paid off a existing loan for $120,000.00 had closing cost ... A: Think of the gains and losses in terms of "pluses" and "minuses". Gains: + 200,000 (from selling ... | |
| Future Value & Compound Interest | 5/22/2010 |
| Q: I am having some difficulty with the following calculation for future value for compound interest ... A: Applying the idea of compound interest once, we get P(1+r) = P+rP Applying twice: P(1+r)(1+r) = ... | |
| grafh | 4/10/2010 |
| Q: plz tell about graph that what is graph and what purpose it from begining thanks A: Aima, This question is too broad in scope to cover in a single question. The answer varies ... | |
| Pre-Algebra | 4/9/2010 |
| Q: Hey I need help on this one word problem... A girl has a bag of coins. 4/9 of the bag are nickles ... A: The clue we get from "how many more" is that we need to subtract the smaller fraction from the ... | |
| basic math | 4/8/2010 |
| Q: Find all the different boxes you can build that have a volume of 24 cubic units. In order for ... A: There are at least two ways of looking at this problem. An informal approach may use paper and ... | |
| re formulate an equasion | 4/3/2010 |
| Q: I formulated an equation while working on a design concerning refraction from a parabolic/spherical ... A: Try turning this into a quadratic equation in terms of y. r*2y = x^2 + y^2 y^2 - 2ry + x^2 = 0 Can ... | |
| Math - Thought Project | 4/1/2010 |
| Q: Find an approximate value for the rate at which the moon orbits the earth. Assume that the moon’s ... A: Knowing the distance between the earth and the moon is a good start. You know what, even though the ... | |
| decimals | 4/1/2010 |
| Q: Do you understand decimals? Such as .01 = 1 oz and what .5 is? This is not homework. I am long past ... A: I read your comments. If what I said had confused you, I am sorry. The last thing I want is for you ... | |
| Real Analysis | 3/31/2010 |
| Q: What is grouping? What is Arrangement? What is difference between Grouping and Arrangement? Give ... A: Rashid, Some one has already offered excellent answers to these questions. See examples at ... | |
| tangents and normals | 3/30/2010 |
| Q: Struggling again! Can you help me please with a number of questions. For each function determine ... A: Life is a struggle. It's okay to ask for help. 1) Consider a curve with a shape that resembles a ... | |
| compound interest with logarithm | 3/27/2010 |
| Q: how to calculate rate of interest using log tables in compound interest A: One way of using logarithm calculation, is to find the period (i.e., how long it takes) to reach a ... | |
| converting repeating decimals into a fractio | 3/26/2010 |
| Q: How do i convert a repeating decimal into a fraction?? For example... .3533... and the last three ... A: The key to this is understanding the role of geometric series. Let me explain. First, observe that ... | |
| probability | 3/17/2010 |
| Q: but you never actually answered my question. Can you plse stick to this exact question, and not ... A: I came across your question in the question pool, without knowing what sort of response you got the ... | |
| The effect of paretheses on math functions | 3/7/2010 |
| Q: Do paretheses around a negative number change the function of these equations? 56 divided by (-8) ... A: Jmays, The answers are no, no and no. 56/(-8) = 56/-8 = -7 The minus sign is associated with the ... | |
| implicit differtiation | 3/5/2010 |
| Q: spent a long,long time on these,can you help me with the following please, differentiate each with ... A: No problem, Richard. Yes, my apologies. Please correct the following in my previous post. Q1 3rd ... | |
| analytical geometry and hyperbola | 3/2/2010 |
| Q: 1.solve simultaneously: 2y-x=3 and y^2-2x^2-x=1 2.determine the value of a in y=a^x which passes ... A: Q1. Let's make y the subject in the first equation. 2y-x=3 becomes y=(x+3)/2. Put this into the ... | |
| implicit differtiation | 3/1/2010 |
| Q: spent a long,long time on these,can you help me with the following please, differentiate each with ... A: The general idea of implicit differentiation is this: Given a function f(x,y) with dependencies on ... | |
| help plz | 2/28/2010 |
| Q: hey john i've got my gcse nxt week, i'm worried with mmy algebra... i have practised past papers ... A: If I have understood correctly, the question reads Simplify [(x+4)(3-x)]/[x^2+9x+20]=[3-x]/[x+5]. ... | |
| algebra 2 | 2/19/2010 |
| Q: evaluate 8^-5/3 A: Do you mean 8^(-5/3) with the whole "-5/3" in the exponent? We can view 8 as 2^3 because 8=2*2*2. ... | |
| ask a question | 2/18/2010 |
| Q: A,B INVESTED 40%,35%AND 25% RESPECTIVELY IN A BUSINESS.AFTER ONE YEAR THERE WAS A PROFIT OF ... A: Tahira, Should there be three parties involved in this investment? Since the ownership ratios are ... | |
| Help! Trigo Question! | 2/17/2010 |
| Q: I really need your help on this question. Find all the angles between -180<x<180 for which cos ... A: Remember that sin(x), cos(x) and tan(x) are 2*pi periodic functions. If angle is measured in radian, ... | |
| Fractions | 2/17/2010 |
| Q: 1. If 63 books cost $126, what will 125 books cost? Calculation: ($126 X 125)/63 Explanation: If ... A: Personally, I would write 7 x (15/21). But it makes no difference to the calculation how you group ... | |
| Math | 2/16/2010 |
| Q: 1. How many ways can 6 different foods be arranged in 6 dishes around a lazy Margaret? 2. How many ... A: Angela, Q1. If I understood correctly, the plates are arranged in a circle. To figure out the ... | |
| Doubling Production | 2/16/2010 |
| Q: I'll put it in terms of a manufacturing problem: Lets say I need to replicate a new part in my ... A: This is one of the most clearly stated questions that I have read for a long time. The formula you ... | |
| algebra help grade 9 | 2/4/2010 |
| Q: Write the equation in standard form using integers y = 4x -11 how do I do this? A: The standard form for a straight line equation is generally acknowledged as Ax + By = C, where A > ... | |
| banking | 2/3/2010 |
| Q: If Rs.10,000/= are invested on the first day of each month for 60 months, please compute the total ... A: There are too many twists in this question for me to contend with. The various suggestions are best ... | |
| Rates - kwh/person/$ for a business | 2/1/2010 |
| Q: I am confused by what I would term a "rates" question. I am trying to work out the kWh electricity ... A: Generally speaking, the average of individual sample ratios is not the same as the ensemble average ... | |
| mathematics | 1/31/2010 |
| Q: if you times one equations by 2 shouldn't you times the other by 2 and i always get stuck at the ... A: It's difficult to talk about this without a concrete example. But given two equations, e.g., solve ... | |
| Z-Score | 1/30/2010 |
| Q: I have a question that asks for a student's individual score - the number of exam scores = 45 The ... A: Abby, I am not actually sure what you need to find. This topic is very well described here ... | |
| Mills & Property Taxes | 1/29/2010 |
| Q: I searched online for information regarding mills. I read the following from this URL: ... A: Kenneth It seems that you are still not comfortable with the word "mills". Re: "I believe that the ... | |
| Solving equations with cos(x) and tan(x) -- using t-substitution | 1/29/2010 |
| Q: Josh, as requested. 6cos(x)-5sec(x) = tan(x) for -180 < x <180 | how do i do this? looked at ... A: Richard, Okay, let's deal with the outstanding issue first. I believe I have already addressed your ... | |
| trigonometric equations | 1/28/2010 |
| Q: questions regarding the attachment. When calculating points,have i went the long way around, when i ... A: Re: Angles sitting at the boundary of each quadrant. | "A.S.T.C." (All Stations To Central) | I have ... | |
| circles | 1/27/2010 |
| Q: 1.Determine the equation of the circle through the points (3;2)(5;-4)with the centre on the line ... A: A circle with center (x=a,y=b) and radius "r" can be described by the equation (x-a)^2+(y-b)^2=r^2 ... | |
| linear systems | 1/27/2010 |
| Q: solve using substitution x-2y=1 3x+3y=21 A: Do you have any example given in your textbook? Step 1: Make either "x" or "y" the subject of an ... | |
| Water level drop = cubic kilometers | 1/26/2010 |
| Q: Lake Mead is an artificial lake formed by the hoover dam, covering parts of both Arizona and Nevada. ... A: Okay Mike. In the word "kilometer", think of "kilo-" as a prefix. All it does is basically ... | |
| Mills & Tax Rates | 1/25/2010 |
| Q: This is a question regarding my previous questions pertaining to mills. I was not allowed to submit ... A: The word "mill" is actually used as a prefix to a unit. Its role is to scale a unit by 1/1000. ... | |
| Math 1010 | 1/24/2010 |
| Q: Van you expound on the and, or with compound equations, Write down ever step in words and examples? A: Myndie, I'm not sure what level of detail you require in your answer, since you did not provide any ... | |
| Mills & Tax Rates | 1/24/2010 |
| Q: This is a question regarding my previous questions pertaining to mills. I was not allowed to submit ... A: Yes, you finally get it:) "mills" is not a denomination, it is not a novel currency unit. It simply ... | |
| Mills & Property Taxes | 1/23/2010 |
| Q: I read the following in a textbook and was somewhat confused by what was written: "A mill is ... A: As I mentioned in my previous reply, we should not think of "mill" as a denomination. It simply ... | |
| trigonometric equations | 1/21/2010 |
| Q: hey Josh, sorry to keep bothering you referrring to Q2 a, i got 2 out of 3 readings, where does ... A: Part 1: Remember, there are always 2 solutions for sin(x)=const. cos(x)=const. tan(x)=const. in ... | |
| trigonometric equations with identities | 1/21/2010 |
| Q: , can you help me? ive attached an image for the following question. the question is the first ... A: I'm a little surprise that you are already fully engaged with mathematics, so early in the year. I ... | |
| trigonometric equations | 1/20/2010 |
| Q: questions regarding the attachment. When calculating points,have i went the long way around, when i ... A: In general, we should look at angles of the four quadrants in terms of x, pi-x, pi+x and 2*pi-x, ... | |
| trigonometric equations with identities | 1/19/2010 |
| Q: , can you help me? ive attached an image for the following question. the question is the first ... A: The question reads: 5*[cos(x)]^2 = 4 - 3*[sin(x)]^2 Your working: 5*[cos(x)]^2 -4 = -3*[sin(x)]^2 ... | |
| Rates | 1/17/2010 |
| Q: Here is myIf two house painters, working at the same rate, can paint one small house in one day, one ... A: As usual, we need to introduce each variable to set this up properly. Definitions: Let R(1) be the ... | |
| maths | 1/17/2010 |
| Q: a shopkeeper bought 150kg of sugar at Rs 18 per kg.he spent Rs75 for transportation and made a ... A: Since you did not show any working, I do not know if you have actually attempted, or even thought ... | |
| maths | 1/16/2010 |
| Q: a shopkeeper bought 150kg of sugar at Rs 18 per kg.he spent Rs75 for transportation and made a ... A: The cost of buying the sugar = 150 [kg] * 18 [Rs/kg] = 2700 [Rs]. The cost of transportation = 75 ... | |
| basic | 1/8/2010 |
| Q: I have found the \following questions in my algebra book, which I did't understand well. Please ... A: 1. If we are dealing with a finite set S that contains |S|=N elements, we can use the "bubble sort" ... | |
| MATH | 12/16/2009 |
| Q: PROBLEM READS:2/3F=-24 A: Do you mean (2/3)*F = -24 ...[1] OR 2/(3F) = -24 ? ...[2] For [1], multiply both sides of the ... | |
| factors and integer coefficients | 12/15/2009 |
| Q: the math problem is attached. i am not sure if i put in numbers for x and y, such as what is y when ... A: The question reads: Put the function into factored form with integer coefficients and then identify ... | |
| cubic and square cm | 12/11/2009 |
| Q: if 1000 cubic cm is worth 0.22c, how much would it cost for 510 square cm That was a math problem ... A: It seems to me that the given units are incompatible. Cubic centimeter (cm^3) is a measure of ... | |
| Probability | 12/10/2009 |
| Q: A package of M&M contains 35 pieces of candy : 5red, 12 yellow, 10 brown,& 8 orange. Find the ... A: This question is about selection without replacement. The best way to understand how the ... | |
| Percent???? | 12/10/2009 |
| Q: I forgot the formula.... Example,,, If a product cost $1785. after an .865 tax, how do I figure the ... A: I'm not sure what your tax figure actually mean. For the sake of discussion, let's suppose the price ... | |
| Ratios | 12/9/2009 |
| Q: Hello: I recently heard that the average person in the watches television 31 hours per week per ... A: I think it should be "31 hours per week" [subsequent "per hour" is deleted]. The second part of the ... | |
| Ratios | 12/7/2009 |
| Q: Have I correctly determined the ratios for how the following amounts are divided? 1. $1000 divided ... A: An average is just the sum of N numbers, divided by N. A ratio gives us a sense of proportion ... | |
| 8 doors | 12/4/2009 |
| Q: what is the final answer to the eight door problem. I give up! A: I have no clue what you are actually asking. How can I help you without a detailed description of ... | |
| trigonometric ratios | 12/4/2009 |
| Q: 2 questions for you, answers supposed to be in square roots. q1. what is the height of an ... A: I guess the confusion has to do with the way fractions are written on a single line. Re: Q1 ... | |
| partial fractions | 12/3/2009 |
| Q: follow up questions Hi Josh, i have many questions, some might make sense to you, some not 1) ... A: No worries, Richard. Re: Q1 where (x^3+1)/(x^2+1) = Ax + B + C/x + D/(x^2+1). Ans: Assuming that ... | |
| Radians | 12/2/2009 |
| Q: can you help me please, Q1 change rads to degrees 0.6 rads = 34.38 degrees (2d.p.) ... A: Q1. To convert from x degree to radian, compute (x/180)*pi [radian]. To convert from w radian to ... | |
| math question | 12/2/2009 |
| Q: write the equation of the line that passes through the given point and is parallel to the given ... A: As a general policy, we would like everyone to attempt the questions first before writing in to us. ... | |
| polynomial division | 12/1/2009 |
| Q: "Hi Josh, problems with polynomial division, can you help me? 1. x^3-4x^2+9 ... A: To be honest, long division is not easy to do in this format because things don't line up properly. ... | |
| trigonometric ratios | 11/30/2009 |
| Q: 2 questions for you, answers supposed to be in square roots. q1. what is the height of an ... A: Remember this: The sum of all angles in a triangle is always 180 degrees. For an equilateral ... | |
| Algebra | 11/27/2009 |
| Q: class a and class b donated their class fund totaling $ 127 to an orphanage. if the amount donated ... A: Let "b" be the amount donated by class B. Translate "7 short of two-third of b" as (2/3)*b-7. ... | |
| Weighted Average | 11/23/2009 |
| Q: Unlike a simple arithmetic mean or simple average, I want to give more weight to the more recent ... A: Okay, if I haven't missed anything, your question is asking why | ... | |
| partial fractions | 11/23/2009 |
| Q: when equating coefficients, i'm not sure where to start with this 1) x^3+1 ---- = Ax +B ... A: Once again, I'm glad you keep asking questions. Sometimes, little things stand in the way of ... | |
| Weighted Average | 11/22/2009 |
| Q: Unlike a simple arithmetic mean or simple average, I want to give more weight to the more recent ... A: For a weighted average of the last 6 months based on an exponential weight model, we have a sixth ... | |
| Weighted Average | 11/21/2009 |
| Q: Unlike a simple arithmetic mean or simple average, I want to give more weight to the more recent ... A: There are many ways to compute the weighted average. Basically, the only mathematical requirement is ... | |
| completing the square in quadratic equations,cubic equations,graphs | 11/20/2009 |
| Q: any help you can give me would be greatly appreciated. completing the square in quadratic ... A: Edited: - Q2 | Relationship between the a,b,c,d coefficients of a cubic polynomial and its roots ... | |
| Percentages & Fractions | 11/19/2009 |
| Q: Can $120/5% and $120/2% be tweaked or manipulated in some manner so that the amounts of $2000.00, ... A: I think what we looked at last time is not unrelated to the question that you now pose. Recapping ... | |
| cube | 11/19/2009 |
| Q: how to find cube root of 5000? plz explain with complete steps A: Let the cube root of 5000 be x. What this means is that x*x*x = 5000. This is not a pleasant number ... | |
| partial fractions | 11/17/2009 |
| Q: when equating coefficients, i'm not sure where to start with this 1) x^3+1 ---- = Ax +B ... A: For Q1, (x^3+1)/(x^2+1) = Ax + B + C/x + D/(x^2+1), write LHS numerator as (x^3+x-x+1) = x(x^2+1) ... | |
| area measurement | 11/11/2009 |
| Q: how doi calculate the area in square meters of a triangle and a circle A: The area of a circle is given by pi*r^2, where pi has an approximate value of 3.141593 and r^2=r*r. ... | |
| Percentages & Fractions | 11/11/2009 |
| Q: Can $120/5% and $120/2% be tweaked or manipulated in some manner so that the amounts of $2000.00, ... A: I don't quite understand what you are asking. It confuses me when you say "the amounts" of 1000 (or ... | |
| Algebra | 11/9/2009 |
| Q: Josh, I am taking algebra and I just don't get it here is my question 1/x+5 + 3/x+4 = -1/x2 +9x+20 A: I guess the main difficulty we have concerns with the left hand side (LHS) of the equation. Because ... | |
| Percentages & Fractions | 11/9/2009 |
| Q: Can $120/5% and $120/2% be tweaked or manipulated in some manner so that the amounts of $2000.00, ... A: Once again, I will make the point that it is best to leave out the "%" symbol and "$" sign in any ... | |
| Logical Mathematical | 11/7/2009 |
| Q: if I study hard or I get rich then get A's. There P= study hard Q= I get A's R= I get ... A: In binary representation, let 1 be "true", 0 be "false". The truth table for Q = P or R is given by ... | |
| Fractions | 11/5/2009 |
| Q: 2/3 of Mary’s age equals Sarah’s age and 3/4 of Ruth’s age equals Sarah’s age. If the total ages ... A: Kenneth, The usual way to navigate such a problem is by using linear algebra. This will tell us if ... | |
| Fraction Question | 11/5/2009 |
| Q: By looking at the denominator and the numerator how can you tell if the fraction is greater or less ... A: There are several ways to answer this question. The best answer for you would depend on your ... | |
| simultaneous linear equations | 11/4/2009 |
| Q: y = 2x+3 y = 5x-3 how do i solve this to get x=2 and y=7 and y = 3x -1 ... A: Given two equations with two unknowns, we can use elimination and back-substitution to find the ... | |
| completing the square in quadratic equations | 11/4/2009 |
| Q: out of 50 questions,these three i had a problem with. Can you help me with solving for x,in steps ... A: "Completing the square" may not be the easiest way of finding the answer to these quadratic ... | |
| question | 11/3/2009 |
| Q: How can i solve mathematical problems...involving fractions , ratios and also trigonometric problems ... A: Since you did not mention your school level, it is rather difficult for me to address your specific ... | |
| urgent math | 11/3/2009 |
| Q: Hey there I have a test tomorrow nigh for Calc and I just can't seem to get the answers for these ... A: It is always stressful having so many unanswered questions the day before an exam. Let's see if we ... | |
| natural log question | 10/28/2009 |
| Q: My equation is reduced to 4ln(600/P)=ln(75,000/P). I need to isolate the P but the 4 in the ... A: For any constant "a" and positive real-valued number "x", a*log(x) = log(x^a). e.g., you can verify ... | |
| Inequality word problem | 10/24/2009 |
| Q: Earthquake victims in China need medical supplies and bottled water. Each medical kit measures 1 ... A: Let "m" be the number of medical kits, "w" the number of water containers. There are two separate ... | |
| Algebra | 10/22/2009 |
| Q: Marco is draining his two aquariums. The tank are the same size. One tank has 7in. Of water in it. ... A: Ivory, The amount of water which has been drained at any point in time is given by: R*T, where R is ... | |
| slope-intercept | 10/19/2009 |
| Q: Write the slope-intercept form for an equation of the line perpendicular to the graph of the given ... A: The slope-intercept form for a straight line equation is y=s*x+b. Parameters: s represents the ... | |
| question | 10/19/2009 |
| Q: I lost my job about a year ago and just simply cannot find a job. I have decided to go back to ... A: From the information you have given, 21 cents does not seem to be the right answer. Clearly, ... | |
| word problem | 10/18/2009 |
| Q: This problem from my real estate study guide is worded poorly. " A salesperson's compensation is ... A: This pretty much works in the same way as the tax system. First, the commission earned by the ... | |
| supernova 1054 a.d. chinese | 10/14/2009 |
| Q: In a.d. 1054, chinese astronomers observed the light from a supernova in the night sky. This ... A: Here is a simplistic view of the problem, assuming that Crab Nebula is stationary relative to the ... | |
| algebra 3 | 10/13/2009 |
| Q: i need help on this problem.dont understand where to start x^3+6x^2-4x-24=o finding the real number ... A: Alexis, This question basically asks us to find all possible values of x which make the equation ... | |
| problem solving | 9/21/2009 |
| Q: express the following binary numbers in the decimal system. (a) 11 (b) 101 (c) 11101 (d) 100011 A: We will look at (c) and discuss what it means. The binary string 11101 represents from right to ... | |
| algebra | 9/20/2009 |
| Q: 3-Simplify : 4u+1/u+8 - 3u+2/u+4 - 49u+4/u^2-4u-32 A: This question is just like the one I answered a few days ago. I have already worked through a ... | |
| Pardon my math skills | 9/20/2009 |
| Q: I have to apologize for not knowing some 'basic' math but I've always had an issue with it. I do ... A: I am not familiar with the US tax system. But if it is anything like the Australian tax system, in ... | |
| 'log' | 9/18/2009 |
| Q: I have just been handed a piece of work for college and one of the questions is really irritating ... A: I can take a guess, but the exact procedure varies depending on the calculator you use. Some ... | |
| algebra | 9/18/2009 |
| Q: Simplify t/t-4 + 5/t+5 - 11t-8/t^2+t-20 A: To simplify this expression, we need to be able to combine the fractions. To do this, we need to ... | |
| Order of Operations | 9/17/2009 |
| Q: I'm helping my son with Order of Operations problems. I can do them just fine, and now he can as ... A: One of the primary reasons is to avoid ambiguity. Without proper rules on the order of arithmetic ... | |
| how much does one cost? | 9/16/2009 |
| Q: It has been so long since I have been out of school I forgot how to do this problem. If 48 apples ... A: What we need in this situation is divide 3.28 by 48. Unless you are interested in the actual ... | |
| Probability | 9/5/2009 |
| Q: Pl. solve the problem of the following:- Q:- A bank has a test designed to establish the credit ... A: Manoranjan, The discrete events are represented by the following: F = Fail test, !F = Not fail, D = ... | |
| Problem Solving Question . HELP! | 9/4/2009 |
| Q: PLEASE HELP! I am in grade 9 and am having trouble finding the answer to this problem ... Mason ... A: To understand this problem, let us draw a diagram. Since you have already worked out the perimeter, ... | |
| Averages | 9/3/2009 |
| Q: Have I determined the averages for the following correctly? 3 + 4 + 5 = 12/3 = an average of 4 or ... A: Line 2: idea is correct (1/2 should be 1/3). Line 3: is correct. Line 4: 3/4 = 9/12, not 4/12 Word ... | |
| algebra | 9/2/2009 |
| Q: Find an equation in standard form with integral coefficients that has the given solution set ... A: I think there are two problems with this question. First, perhaps ironically, there is no such thing ... | |
| converting square kilometer to square meter | 9/1/2009 |
| Q: can you teach me how to convert 1 square kilometer to square meter? A: Consider the rectangular grids shown below. A----------B----------C--- | | | | ... | |
| algebra | 8/31/2009 |
| Q: I'm suppose to find the radius of a sphere where volume = 32pi/3 and i'm lost completely. A: Teresa, The formula for the volume of a sphere is V=(4/3)*pi*r^3. May I suggest that you look up a ... | |
| Simple Math Help Please | 8/30/2009 |
| Q: first off thank you for your time. My question is regarding solving the following equation: ... A: Sorry Stephen, I misread the question. Here, instead of adding three fractions, we have an equation ... | |
| Simple Math Help Please | 8/29/2009 |
| Q: first off thank you for your time. My question is regarding solving the following equation: ... A: I think I know the missing link. To understand this properly, we will first look at the problem, ... | |
| Algebra Equations & Units | 8/29/2009 |
| Q: Why are the units not used with an algebra equation? For example, Five percent times some number ... A: Kenneth, The general idea behind algebra is to capture mathematical information (read "certain ... | |
| brackets | 8/26/2009 |
| Q: Im doing my best but I still dont understan the following : ... A: Rebecca, The bits and pieces inside the square brackets are the first things we should concentrate ... | |
| Weighted Averages | 8/25/2009 |
| Q: One method used to determine the amounts to invest $30,000 in two accounts at 2% and 5% for a total ... A: Kenneth, Whether the investor wants one or more options is beside the point. He has no say in the ... | |
| physics | 8/24/2009 |
| Q: A pilot flies her airplane to Columbus, Ohio and then back. The airplane can go a speed of 139.66 ... A: Imagine flying from A to B to A. A.................B (Columbus) Velocity v1 for outbound journey ... | |
| Weighted Averages | 8/24/2009 |
| Q: One method used to determine the amounts to invest $30,000 in two accounts at 2% and 5% for a total ... A: Kenneth, The method you proposed does not easily extend to situations which involve 3 variables. We ... | |
| fractions | 8/22/2009 |
| Q: How many 1 and 3/4 inch long machine bolt blanks can be cut from a 5-foot length of stock? allow ... A: If we cut N pieces, and each bolt is X in length, the useful portion will be N*X in total length. ... | |
| need guidance on this math question | 8/21/2009 |
| Q: 8 { [4 z - 2) +18] - [ 3 (4z-2) + 6] = A: Whenever I see nested expressions, I always start simplifying things inside the inner-most bracket ... | |
| word problem | 8/20/2009 |
| Q: A grocer purchased a quantity of bananas at 3 pounds for $0.50 and sold the entire quantity at 4 ... A: Let us convert each set of numbers to a unit price. Before: 0.5/3 [dollar/pound] After: 1.0/4 ... | |
| Percentages & Averages | 8/20/2009 |
| Q: An investor invests $1000.00 in two accounts, one account of $200 earning 2% at simple interest and ... A: Well, you can look at "2*0.2 + 5*0.8" in terms of [2*200+5*800]/(200+800). The division is known as ... | |
| Percentages & Averages | 8/19/2009 |
| Q: An investor invests $1000.00 in two accounts, one account of $200 earning 2% at simple interest and ... A: Kenneth, Re: second paragraph We need to take a weighted average of 2% and 5% to get 4.4%. Since ... | |
| physics | 8/18/2009 |
| Q: A football is kicked straight upwards with an initial velocity of +29.8 m/s. How long will it be in ... A: This is a classical question on projectile motion. Following a curved path from A to M to B, the ... | |
| word problem | 8/18/2009 |
| Q: If 15 times the reciprocal of a number is added to the ratio of 7 less than 9 times the same number ... A: I think you are on the right track. To avoid confusion, however, I will add extra brackets for ... | |
| Linear equation | 7/8/2009 |
| Q: Below problem has given me to solve as assignment from my university. Department A B C I ... A: Your question is of the form Maximize C=c1+c2+c3 where c1=20x+30y+40z, c2=20u+30v+40w, ... | |
| fuel efficiency | 7/7/2009 |
| Q: Fuel Efficiency. Last week, Joe’s Electric Service used 110 gallons of gasoline in its two trucks. ... A: The fuel used by each truck is given by D(distance driven) times E(efficiency). Let D be the ... | |
| Algebra 2 | 7/5/2009 |
| Q: Give the domain of the linear equation: y= x + 2 _____ x A: Brandon, The domain is the set of values that x can take without causing the function to "explode". ... | |
| co-ordinate geometry | 6/22/2009 |
| Q: Find the equation of the line having intercept –3 and 7 on the co-ordinate axis a) 7x-3y+21=0 ... A: Shruti, Giving you the right answer is not going to help you much if you do not explain what you ... | |
| Probability | 6/20/2009 |
| Q: I have 3 questions I can't seem to work out. 1. 2 cards are simultaneously drawn from an ordinary ... A: This answer suggests that it is NOT necessary to have at least one pair of each color. The main ... | |
| Probability | 6/19/2009 |
| Q: I have 3 questions I can't seem to work out. 1. 2 cards are simultaneously drawn from an ordinary ... A: Given the limited space we have, I will start with the assumption that you are already quite ... | |
| Order of Operation | 6/16/2009 |
| Q: -6x-7(4+3x) Thanks, Josh! A: Gita, As a general rule, always simplify any expression inside the parenthesis first if at all ... | |
| ratio and proportion | 6/14/2009 |
| Q: Last year Department store X had a sales total for December that was 4 times the average(arithmetic ... A: Shruti, The sale for that year consists of two parts: 1) Let A represents sales total for January ... | |
| Please Help with %s. | 6/14/2009 |
| Q: I need to calculate this. There are two sections A and B. A is 150 points, B is 200 points. Both A ... A: To calculate the worth of each A point as a percentage of the total, we need to look at only two ... | |
| word problem | 6/12/2009 |
| Q: A model rocket is shot into the air and its path is approximated by h = -5t sqaured + 30t where h is ... A: For 1), you need to find t when the rocket has zero elevation. i.e., you set h=0 in the equation and ... | |
| sets | 6/10/2009 |
| Q: In Company X, 30 percent of the employees live over ten miles from work and 60 percent of the ... A: I had a quick look at the question, I think it goes like this. Let M denote the set of employees ... | |
| Multiplied by zero | 6/9/2009 |
| Q: My math teacher states that n*0 = 0, n=integer. So : 2*3=6 which means 6/3=2 15*3=45 which means ... A: This is a good question because zero plays an important role in mathematics. It is true that any ... | |
| sequences | 6/8/2009 |
| Q: Please help. TheThe sum of the first three terms of a geometric sequence of positive integers is ... A: Jackie, Re: a+b+c=7a ...[1] and a+b+c+d=45 ...[2], what you said is true. To go further, we need to ... | |
| area | 6/3/2009 |
| Q: the area of a regular octagon is 35 cm squared. What is the area of a similar octagon with sides sex ... A: Amber, I will refer you to the diagram at ... | |
| Stock Profit | 6/2/2009 |
| Q: Not too long ago I asked the following question, and you replied with the answer that follows myAn ... A: $55.44 vs $54.42. The differences are minor. I don't think we need to debate over this. The ... | |
| Dates | 5/22/2009 |
| Q: Josh, this might be a bit out of the norm for you, but according to your profile, I suspect you ... A: Jan, Many people have reservation about the trustworthiness of Microsoft product. Version ... | |
| Stock Profit | 5/21/2009 |
| Q: An investors buys 100 shares of stock where he is employed at $50.00 per share. Brokerage commission ... A: Kenneth, C is the amount of money you end up paying. It includes: 1) the net value of the shares, ... | |
| Dates | 5/21/2009 |
| Q: Josh, this might be a bit out of the norm for you, but according to your profile, I suspect you ... A: This algorithm is not particularly easy to analyze. I tried Reverend Deller's method and wrote the ... | |
| Roots | 5/20/2009 |
| Q: Why is it important to find the roots of equations..in a practical application.Same for complex ... A: This is an excellent question. Let's look at this in two parts. First, the practical significance of ... | |
| Stock Profit | 5/20/2009 |
| Q: An investors buys 100 shares of stock where he is employed at $50.00 per share. Brokerage commission ... A: Kenneth Your setup does not produce an equation to be solved. It's confusing to set ?-$20/$5020 ... | |
| probabilities | 5/17/2009 |
| Q: Team A is competing against Team B in a best-of-7 series (whoever wins 4 games). Games #1,2,5 and 7 ... A: This is going to be more like a tutorial than regular Q&A. Before we discuss the problem in detail, ... | |
| Percentages & Multiple Investment Accounts | 5/15/2009 |
| Q: If an investor has $1000.00 to invest in multiple accounts, and he wants a total return of 4%, is ... A: Re: Is it necessary to obtain a unique solution Only you can answer that. If you are only ... | |
| Percentages & Multiple Investment Accounts | 5/14/2009 |
| Q: If an investor has $1000.00 to invest in multiple accounts, and he wants a total return of 4%, is ... A: Kenneth, All relevant points were covered in the the post written on May 8th(see duplicated copy ... | |
| Probability Questions: | 5/14/2009 |
| Q: A and B play chess every day. The probability that A beats B in any game is twice the probability ... A: Brief summary: Q1. The answer I got is 1/10. Refer to worked solution below. Q2. P(C)+P(D) = ... | |
| Percentages & Multiple Investment Accounts | 5/13/2009 |
| Q: If an investor has $1000.00 to invest in multiple accounts, and he wants a total return of 4%, is ... A: We can use the same technique that we looked at last time to handle the first situation. Refer to ... | |
| Derivation | 5/13/2009 |
| Q: I am trying to calculate dV/dp from this equation: p(V-nb)-nRT=0. How would you do it? Thank you. ... A: Don't forget, we also know p=nRT/(V-nb) from the very beginning. So, we can substitute for p in ... | |
| Derivation | 5/12/2009 |
| Q: I am trying to calculate dV/dp from this equation: p(V-nb)-nRT=0. How would you do it? Thank you. A: First, may I suggest we rewrite the equation, separating the two variables "p" and "V". ... | |
| Math | 5/9/2009 |
| Q: Factor 9p^2+6p-8 A: Compare 9p^2+6p-8 with ap^2+bp+c. Here, a=9, b=6 and c=-8. Method 1: Using the quadratic formula, ... | |
| math | 5/7/2009 |
| Q: QuickI have to "evaluate" for 2 "to the power of" -3.... when i look at the anser sheet it is saying ... A: "2 to the power of 3" is equivalent to multiplying 2 by itself three times. This is the same as ... | |
| Percentages | 5/6/2009 |
| Q: If I want to invest $1000.00 in two accounts one at 2% and one at 5% for a total return of $44.00, I ... A: I have three comments in regard to your questions: 1. Your approach to the problem seems quite ... | |
| math | 5/5/2009 |
| Q: Given the equation of a line y = 2x+5,passin through y axis at A, write down the equation of a line ... A: Suneetha, The key points for this question are as follows: 1. The point where a straight line ... | |
| math application | 5/3/2009 |
| Q: At age 35 louise starts an IRA to save for retirement. she deposits $50 at the end of each month. IF ... A: Holly The formula may be constructed based on an understanding of geometric series. It will be ... | |
| combining wave | 5/2/2009 |
| Q: would you explain me how to get this: 8sin(50px+p/4)+7sin(50px-p/3) ANSWER: Dear Patrick, Since ... A: The amplitude and phase shift are given by A and Q, respectively. The approximate values of A and Q ... | |
| Combinations | 4/11/2009 |
| Q: We have six golf teams in our conference, and in matches all six teams play together, with three ... A: Bob, You guys are terrible (tongue in cheek) always give me these complex problems to work on. I ... | |
| Quantitative Analysis for Managerial Applications | 4/10/2009 |
| Q: A study of iron deficiency among infants compared samples of infants following different feeding ... A: You need to compute the test statistic t=(mean(x)-mu_0)/(s/sqrt(n)). Here, set mu_0=12.4 (the mean ... | |
| Average & Compound Interest | 4/9/2009 |
| Q: How is the average determined for the following amount if it earns compound interest? Here are my ... A: Let r=0.05, s=-0.02 and P=500. The overall change is given by P*(1+r)*(1+s)-P. What you have done ... | |
| Reflection of a parabola along the x-axis with use of a changed x-axis | 4/9/2009 |
| Q: In the form y=a(x-p)^2+q, would it be possible to reflect along the x-axis(Not at the y=0, but where ... A: I'm not sure that I understand what you are asking. Anyway, we basically have either an upright or ... | |
| Algebra | 4/6/2009 |
| Q: Two consecutive numbers is 14 less than 10 times the smaller number (smaller numbers equals X) find ... A: We can do this step by step using the information given. By the way, i think something is ... | |
| Error bars | 4/6/2009 |
| Q: I'm trying to get error bars on my bar chart on Excel. My graph shows the mean egg production on ... A: I think the average should be computed for each value of X, over all samples that belong to that ... | |
| Ansering the kitchen floor problem | 4/3/2009 |
| Q: i was lookin out the problem with the kitch floor and putting in 5'' tiles. i understand how to ... A: Using improper fractions, we have 25/2 ft and 31/3 ft. I think it is much easier to calculate ... | |
| inches | 4/2/2009 |
| Q: i measured with a ruler 2.10in is that correct or should it be converted? A: I cannot know if you are reading the measurement correctly. But if one inch is divided in 16 equal ... | |
| combining wave | 3/31/2009 |
| Q: would you explain me how to get this: 8sin(50px+p/4)+7sin(50px-p/3) A: Since you did not mention your level of studies, I cannot be sure what type of response would be ... | |
| percentages | 3/30/2009 |
| Q: If nett total is $900.00 inluding 10% GST, how can I find out what the gross total was? A: It's good hearing from an Aussie. The total cost is 1.1 times the original cost of the item. If we ... | |
| math | 3/28/2009 |
| Q: ok so i have to change 1/4th % into it's lowest fraction, the answers to choose from are 4, 40, ... A: What you said is correct in regard to 1/4 being equal to 25/100. I think the step that is missing, ... | |
| Permutations | 3/27/2009 |
| Q: I am making a tennis schedule. There are 12 players; 8 of the 12 players play each week on 2 tennis ... A: The number of combination is given by C(12,8)=12!/[(12-8)!8!], where n! is defined as ... | |
| Mills | 3/26/2009 |
| Q: If I want to express 13 mills as a decimal part of $1.00, the answer is $0.013. This amount is found ... A: I must say, I find it very awkward to mingle word units in equations. If you don't mind, I like to ... | |
| Mills | 3/25/2009 |
| Q: If I want to express 13 mills as a decimal part of $1.00, the answer is $0.013. This amount is found ... A: I think we need to draw a line between mathematics and the terminologies used outside of ... | |
| Polar Conversion Quadrant Determination | 3/25/2009 |
| Q: the angle tan-1(-1/-1) comes out to be 45 degrees. In actuality it is really in the third quadrant ... A: You are right. The complex number "-1-i" lives in the third quadrant 180<x<=270 in the Argand plane. ... | |
| MIlls | 3/23/2009 |
| Q: I have a question regarding "mills." There are 1000 mills per United States American $1.00. 13 ... A: Mills is short for "milli", it is not a currency as in an American dollar. It is a scientific unit ... | |
| probabilty simulation | 3/22/2009 |
| Q: what is the probabilty that at least 2 people in a random group of 3 will have the same sign of the ... A: The theoretical probability is the only thing we can calculate here, without conducting an actual ... | |
| match probem | 3/3/2009 |
| Q: (x+iy)/(x-iy)=i |1-(x+iy)|=x+iy FIND X n Y A: Using Euler's notation, let x+iy=R*exp(iq). Here, q represents the argument, ... | |
| Basic Stats | 3/3/2009 |
| Q: Hey - I understand how to do a lot of these problems, but this one has been giving me trouble. ... A: A standard deck contains 52 cards. We have 13 cards {2,3,4,5,6,7,8,9,J,Q,K,A} for spade, heart, club ... | |
| math | 3/1/2009 |
| Q: if a train cross a pole in 10 second and cross a 150 mtr length Platform in 20 second.then findout ... A: Drawing a diagram helps Imagine the train travelling from left to right. B denotes the pole, BC ... | |
| math | 2/27/2009 |
| Q: what is the formula (simplified for 7th grade) for finding the probability of drawing 3 queens ... A: We start with 4 queens in a full deck of cards. For the first pick, there is a 4 out of 52 chance of ... | |
| right triangle word problems | 2/25/2009 |
| Q: the legs of a right triangle measure 3 and 4. find to the nearest degree the measure of the smallest ... A: Let me draw a diagram so that we understand each other perfectly. A | | | B---------C Assuming the ... | |
| Fractions & Percentages | 2/23/2009 |
| Q: I want to try to determine the amounts in the following calculation by using any one or more of the ... A: For the graphical method, we rewrite both equations in gradient-intercept form: Equation 1: ... | |
| EVALUATING TRIGONOMETRIC FUNCTIONS | 2/23/2009 |
| Q: I ask John he said it was out of his expertise. Hope you can help, truly needed this answered before ... A: It's easier to answer Q2 first. Some basic intuition about emotion fluctuation: Consider the ... | |
| Fractions & Percentages | 2/22/2009 |
| Q: I want to try to determine the amounts in the following calculation by using any one or more of the ... A: Kenneth, As far as I know, there are no established methods for doing this other than using ... | |
| compund inequality | 2/5/2009 |
| Q: Reason: I was in my 7th grade class taking a test on inequalities. The class was about over, but ... A: From what you have said, I think you already know the meaning of compound inequality. Just to recap, ... | |
| equation help | 2/4/2009 |
| Q: Ace hardware sells wrenches for ($86) and hammers for ($300). Ordered were 45 cartons total. $9200 ... A: The meaning of a carton is unclear. But it is reasonably to assume that it relates to the number of ... | |
| coefficients | 2/4/2009 |
| Q: I am stuck on a math problem that involves adding coefficients. I will type in the part that I just ... A: Response to comments from questioner. Note 1: I accept the questioner's criticism that the response ... | |
| perpindicular lines and formulas | 2/2/2009 |
| Q: My question is this: I don't understand the formula to which I have to find the equation, in ... A: A straight line equation can be written in a number of ways. We use different forms depending on ... | |
| Some Equation help | 2/1/2009 |
| Q: (-6) -3 ------- ------ (3x-2)^2 = 2 How do i Solve for x? A: Mike, The problem we have here is that the unknown "x" sits at the bottom of a fraction. To ... | |
| help please :) | 2/1/2009 |
| Q: 1. Let U= (q,r,s,t,u,v,w,x,y,z) A= (q,s,u,w,y) B= (q,s,y,z) C= (v,w,x,y,z) List the elements in the ... A: 1. (A U B) describes the union of set A and B. It includes all elements found in either set A or set ... | |
| math | 1/30/2009 |
| Q: can you give me a basic understanding on how to put decimals in order from smallest to largest ? A: Well, Alexis, we will refer to a decimal figure in two parts. Consider the number 4.5 The "4" ... | |
| length | 1/29/2009 |
| Q: "Hi, is there a formula to work out the hypotenuse length in a right angle triangle when you know ... A: Let me draw a diagram so that we are on the same page. === CASE 1 === First, let us consider a ... | |
| hypotenuse length | 1/29/2009 |
| Q: "Hi, is there a formula to work out the hypotenuse length in a right angle triangle when you know ... A: If the length of the two shorter sides (adjacent to the right angle) are X and Y, respectively, then ... | |
| fractions | 1/28/2009 |
| Q: How do I solve this problem 2 1/2 x 1 5/9 x 1 2/7this is very confusing for me A: Crissy, One way to multiply mixed fractions (i.e., numbers with an integer part and fraction part) ... | |
| math | 1/27/2009 |
| Q: My question is this: Kyle made an array using 15 square tiles. His array had 3 columns. How many ... A: The number of square tiles is interpreted as the area of a rectangle in this question. It is given ... | |
| The can question | 1/21/2009 |
| Q: I need some help please....my daughter is in 3rd grade and has a math question that i can not figure ... A: This is not a maths question I don't think. Does the question read "it can be seen" or "it can't be ... | |
| Tee-Time Combinations | 1/20/2009 |
| Q: On our golf trip this spring, 12 of us will be playing for 6 days and we want to play with everyone ... A: This is a difficult question which I do not have the answer to. The number of ways in which three ... | |
| Tee-Time Combinations | 1/19/2009 |
| Q: On our golf trip this spring, 12 of us will be playing for 6 days and we want to play with everyone ... A: I answered a very similar question for Aidan some time ago. You may wish to read the transcript ... | |
| Mathematics | 1/19/2009 |
| Q: Question 1 A pharmaceutical company makes tablets which contain calcium in powder form. 85 kg of ... A: These look like homework questions....and they are very similar to the one I answered last time. I ... | |
| Finding an expression to represent a pattern | 1/18/2009 |
| Q: I have two questions about finding an expression to represent a pattern so that one does not have to ... A: Broadly speaking, sequences fall into one of two categories: deterministic ones and random ones. ... | |
| Making Change | 1/16/2009 |
| Q: Would it be logical to pay for something that costs $0.41 with the amount of $1.06, $1.00 plus five ... A: I cannot answer this, does this not come down to personal preference? I guess it also depends on a ... | |
| basic math | 1/14/2009 |
| Q: a/a-1/a-a/1-a =a/a-1/a-a^2-a/1-a =a/a-1/-a^2 =a/a-1-a/a^2 =a/a+1-a/a^2 =a/a^3+1-a/a =a*a^2/a^3-a+1 ... A: Surya You have to understand that it is VERY difficult to read any expression involving fractions ... | |
| Number systems | 1/14/2009 |
| Q: Don cuts metal to size. he receives an order from an overseas company for 400 pieces thin metal ... A: I noticed the use of comma instead of dot for the decimal point, this convention suggests to me that ... | |
| Math | 1/13/2009 |
| Q: What is the order of measurement when using units: unit, square unit, cubic unit A: As I do not know what you have learned beforehand, I am not exactly sure what you meant by "the ... | |
| determine circle equation | 1/10/2009 |
| Q: Find the equation of a circle whose diameter runs from (-5,7) to the point of intersection of the ... A: Anan, You are sort of half way there. The problem you are facing is that you need to work out the ... | |
| Point-Slope intercept form. | 1/7/2009 |
| Q: Im still hoping you get on this haha.. It tells me.. " Use point-slope form to write an ewuation of ... A: I can give you a simple answer, but I would much rather that you learn how to do this yourself for ... | |
| equation of line parallel to another line | 12/19/2008 |
| Q: Find the equation of line that is parallel to another line whose equation is known and the distance ... A: Jerry If the known equation is given by y=mx+b, then the equation of the new line parallel to this ... | |
| Calculus | 12/18/2008 |
| Q: You did such a great job with my last question that I am going to ask you one more. Thanks so much. ... A: That's all right. "eps" is the Greek alphabet epsilon, which you can look up on a search engine. It ... | |
| Calculus | 12/18/2008 |
| Q: You did such a great job with my last question that I am going to ask you one more. Thanks so much. ... A: The conditions of continuity require f'(x=-2-eps) = f'(x=-2+eps) f'(x=4-eps) = f'(x=4+eps) in the ... | |
| Calculus | 12/17/2008 |
| Q: Provide you very own equation of a rational function, g(x), that has a vertical asymptote at x=-8, ... A: This question may sound impossible to begin with, but it's not actually as difficult as it seems. ... | |
| adding percentages to dollar amounts | 12/16/2008 |
| Q: how would i add a sales tax of 6.25% to any dollar amount. i can't figure out how to add it to a ... A: 6.25% is equivalent to 0.0625. Using a calculator, we multiply 10.27 by 0.0625 to get 0.641875. We ... | |
| density = weight/volume | 12/16/2008 |
| Q: Josh I am pulling my hair out can you help me work out this problem.... Suppose a full 50 gallon ... A: Sonya To ensure that you attempt these yourself, I will answer each of your questions indirectly. ... | |
| math | 12/15/2008 |
| Q: determine the amplitude, period, and phase shift of the function, y = 1/2 sin(x + pi) then ... A: Jerry Let's look at the general equation for a sinusoidal waveform. Consider y=A*sin(kx+q). ... | |
| CALC | 12/14/2008 |
| Q: If V is the volume of a cube with edge length X, find dV/dt in terms of dx/dt A: We do this using the chain rule: dV/dt = (dV/dx) (dx/dt) Here, dV/dt is the rate of change in ... | |
| Multiple Solutions | 11/12/2008 |
| Q: An investor invested $30,000 for one year at simple interest; one portion was invested a 5% and the ... A: Regarding your explanation, they make sense if you delete "2% x 5" and "2% x 8" from (1) and (2) ... | |
| Multiple Solutions | 11/11/2008 |
| Q: An investor invested $30,000 for one year at simple interest; one portion was invested a 5% and the ... A: I am not sure how you pulled the numbers and the relationship of "4% X a + 2% X b = 26" with the ... | |
| problem solving | 11/10/2008 |
| Q: In the following equation, if x is measured in meters and t is measured in seconds, identify the ... A: What applies to the variables applies to the units as well. Since v=x/t, x has unit measured in ... | |
| problem solving in college | 10/22/2008 |
| Q: Graph each of the following. 1. The line that passes through the points (1,2), (7,4) ... A: Jerry There are many web pages on this topic. Most of them have applets which allow the user to ... | |
| Math | 10/22/2008 |
| Q: What is the mode for 198,81,114,65,98,21,119,184,70, and 100 A: In mathematics, the mode is the number that appears most often in a list of elements. e.g., 3 is the ... | |
| problem solving in college | 10/20/2008 |
| Q: 1. solve x = yz for the variable y and z 2.solve v = d/t for the variable d 3. solve 3x = wyz for ... A: I think we need to rearrange the equation, so that the variable of interest (be it x, y, z or ... | |
| Word Problem | 10/19/2008 |
| Q: Problem: The License plate on my car contains 5 different digits. My son installed it upside down, ... A: Your observations are pretty much spot on. Let me add one thing. The digit 0 should also be included ... | |
| Linear Regression Modeling | 10/19/2008 |
| Q: I have been working on a math project and I can't seem to find out how to do this problem: I have to ... A: I need to clarify something with you first before I can help. Are w(t) and P(t) the two functions ... | |
| PIP Value Calculation | 10/17/2008 |
| Q: I have a question that pertains to a calculation used in the currency trading markets. Can you try ... A: I guess it all comes down to common practice rather than mathematical justification as you could ... | |
| Fractions | 10/16/2008 |
| Q: How do you transform a repeating decimal into a fraction? I just don't get how to. Please help. ... A: I happened to have answered this question in the past, so I thought this might be useful to know. ... | |
| converting fractions to percentiges | 10/16/2008 |
| Q: how do i put: 5/18 into a percentage? please help me A: Two possibilities: 1) Work this out on a calculator, which is probably not something you should ... | |
| range | 10/16/2008 |
| Q: How do you find range for any equation? I forgot how to and none of the sites help me understand how ... A: The range is the set of all possible values that a function can take. Consider the equation ... | |
| quadratics | 10/7/2008 |
| Q: hey there would really appriciatie you taking the time to help me. the question states:3x^2-4=0 ... A: Generally speaking, we should use the quadratic formula ... | |
| maths physics | 10/4/2008 |
| Q: I am s secondary school student and I need help with this question at least some ideas about how to ... A: I can now answer your question to better suit your needs. I think we can describe the situation ... | |
| Math | 10/3/2008 |
| Q: I'm really having trouble on how to get the answer on the following steps and I hope you could help ... A: What happens between the first and second step is this: First, we write log(0.1) as log(1/10). Now, ... | |
| school | 9/11/2008 |
| Q: 4 0s 2 0s 1 0s 0 0s okay bi thanks A: I tried to understand the question, but it has proved impossible because the characters no longer ... | |
| permutations of 4 from 12 | 9/10/2008 |
| Q: This is a practial question re golf four balls. I am going on a golfing holiday with 11 others and ... A: Aidan, There are 66 unique pairings according to my calculation (12!/(10!*2!)). You need at least ... | |
| problem solving | 9/10/2008 |
| Q: It is greater than 43 and less than 52. If you add the digits, the sum is 8. What is the number? It ... A: Shaquan, These questions test your understanding of the metric system. In the first question, ... | |
| Add weighted Percentages | 9/9/2008 |
| Q: I am creating a compensation spreadsheet which contains 3 sections that I want to combined to give a ... A: If we represent the components from the three sections by A, B and C, respectively, then the total ... | |
| College Math | 9/8/2008 |
| Q: -rt When using the formula P=Ae how is it entered on the ... A: It depends on what type of calculator you are using. It is common nowadays that formulas are punched ... | |
| Math | 8/28/2008 |
| Q: Add and simplify 7/10 + 5/8 + 7/20 A: Aimee, To add fractions together you need to know about "common denominators". Please look up ... | |
| square and cube roots | 8/26/2008 |
| Q: find the approximate length of the side of a square whose area is equal to the area of a rectangle ... A: The best way for me to help is that you attempt this problem yourself, then let me know where you ... | |
| how to do | 8/22/2008 |
| Q: principle=$400000,compound interest=$53600 ,rate=6.5 then time=? A: deepak, we make use of the compound interest equation in this problem. observe that the amount at ... | |
| algebra | 8/22/2008 |
| Q: D/2 + F/4 = 6 A: Darneshia, You have to tell me what the question asks for. The expression on its own does not tell ... | |
| Perpendicular Lines | 8/21/2008 |
| Q: I have a question in my homework, but I don't know how to do it, can you help? The question is: ... A: We can always arrange two straight line equations in the form of y=mx+b and y=nx+c, where "m and n" ... | |
| tape measure | 8/19/2008 |
| Q: how to read one?? A: It's hard for me to answer this question as the markings are different on the ruler depending on ... | |
| Purchases | 8/16/2008 |
| Q: Here is myDuring a "One Cent Sale" a drug store offers two articles of the same kind for the regular ... A: Kenneth, We are buying 2 tubes of toothpaste and 2 bottles of shampoo. To finding the saving, we ... | |
| Domain | 8/6/2008 |
| Q: I was wondering how I could get started on this problem or what to do. Write an equation with the ... A: The basic idea is still the same. We look for the set of values that x can take to cover the space ... | |
| Domain | 8/5/2008 |
| Q: I was wondering how I could get started on this problem or what to do. Write an equation with the ... A: The word "domain" basically means the set of values that x can take to generate a function y=f(x). ... | |
| Square Roots | 8/5/2008 |
| Q: Why x is the anwser to the square root of x^2 only when x is positive? I'm not sure if I understand ... A: The statement "x is the answer to the square root of x^2" only tells half the story. In fact, +x and ... | |
| Work = Time * Rate | 8/4/2008 |
| Q: I was hoping that you could help me solve this problem? Working alone, Bill can finish the job one ... A: What would you do to get started? Before we attempt to solve this problem, we should assign a ... | |
| Mathematical series | 8/2/2008 |
| Q: Please help with the next probable number: 4, 16, 32, 64 ANSWER: Dr Deepak This is most unusual. ... A: With no a priori information, this is a hopeless task. One could come up with many guesses, ranging ... | |
| trigonomtery basic problem-need help | 8/1/2008 |
| Q: PQR is a right angled TRAINGLE. Q is right angled. Now we have PQ+QR = 25 cm here. So,question is ... A: Rohit We can find an expression for each of the things you mentioned, but we do not have all the ... | |
| Mathematical series | 8/1/2008 |
| Q: Please help with the next probable number: 4, 16, 32, 64 A: Dr Deepak This is most unusual. It does not match a geometric sequence or a logarithmic profile. ... | |
| Game Theory | 7/31/2008 |
| Q: I had to ask a new question because it only allows 2 follow-ups. You are right, of course.. the ... A: I am also an engineer by training, so I cannot picture myself being a mathematician at all. I have ... | |
| Game Theory | 7/30/2008 |
| Q: I had to ask a new question because it only allows 2 follow-ups. You are right, of course.. the ... A: Sounds like you have found the right person for the job. He must be highly qualified having worked ... | |
| permutations, I think | 7/30/2008 |
| Q: Suppose you have a game board 3x5. The number of squares is therefore 15. But a piece can't be in ... A: I would prefer to answer questions in this forum rather than through private correspondence. This ... | |
| permutations, I think | 7/29/2008 |
| Q: Suppose you have a game board 3x5. The number of squares is therefore 15. But a piece can't be in ... A: I should apologize for any confusion I may have caused and use this opportunity to find the right ... | |
| permutations, I think | 7/29/2008 |
| Q: Suppose you have a game board 3x5. The number of squares is therefore 15. But a piece can't be in ... A: Let's label the board as follows: A B C D E F G x I J K L M N O Some observations: For the first ... | |
| formulas | 7/28/2008 |
| Q: its very difficult for me to remeber formulas,i learn them for my exams but then i forget them very ... A: Since there was no mention of specific areas that you would like to discuss, I will attempt to ... | |
| math | 7/28/2008 |
| Q: x=yz both y and z measured in feet A: Since you did not mention what you are having trouble with, I am not sure if I can answer your ... | |
| physics math | 7/25/2008 |
| Q: i know the volume formula but i can figure out how to use that to find the radius. the volume is ... A: kkknorth, The answer depends on what shape an object we are dealing with. If it's a cylinder with ... | |
| Algebra | 7/23/2008 |
| Q: two polynomials can have the same x intercept.Explain. Why A: I am trying to see what the question is really asking to offer you an explanation. Obviously, if two ... | |
| perpendicular line | 4/2/2008 |
| Q: find the equation of the line perpendicular to 2x+3y=4 through the point (6,5) thanks A: Imran, Here are the steps: 1) Determine the gradient or slope of the given straight line equation. ... | |
| Satistics OUTLIER | 4/2/2008 |
| Q: I am trying to help my daughter with her homework, but I cannot understand the concept of outliers. ... A: An outlier is basically a data point which does not conform to the observed trend. If we include ... | |
| Average | 4/1/2008 |
| Q: 3 children ages 2, 4, and 6. what was their average age? A: The average is obtained in two steps: 1. Add up all the numbers i.e., 2+4+6=12 2. Divide this by ... | |
| substitute | 4/1/2008 |
| Q: the following procedure converts 8 ft to inches 8ft=8ft(1) =8ft(12in) 1 =96 inches ... A: Lopaka, I am not sure that the question reads right. I think this is how it should go: 8 ft = 8 ... | |
| Angles | 3/25/2008 |
| Q: Find the measure of each angle in the triangle given (9x-4), (4x+1), (3x+7) for the angles. A: The key concept you need to remember is that the angles inside a triangle always add up to 180 ... | |
| density of the state of oklahoma | 3/24/2008 |
| Q: i'm not good in math and im stuck on how to start and find the answer. i was giving the answer of ... A: Density can be defined in a number of ways depending on the context. In chemistry, the density of a ... | |
| math | 3/23/2008 |
| Q: underline the key pieces of information contained in the probelem statement. A: Sera, I can't help unless you explain what you need help with. This question cannot be answered ... | |
| basic math problem | 3/20/2008 |
| Q: I don't understand how to solve this: Add 12 1/3tons to 20 tons 500 pounds??? A: Evangeline, We cannot add quantities with different units. Consider writing down 1 unit. What does ... | |
| TRIGNOMETRY | 3/18/2008 |
| Q: find the value of tan300*+tan210*/ 1 - tan300*tan210* in surd form. ANSWER: Emmy, A helpful ... A: [tan(300)+tan(210)]/[1-tan(300)*tan(210)] =[-tan(60)+tan(30)]/[1+tan(60)*tan(30)] ... | |
| TRIGNOMETRY | 3/17/2008 |
| Q: find the value of tan300*+tan210*/ 1 - tan300*tan210* in surd form. A: Emmy, A helpful starting point is to divide one complete revolution of a circle (i.e., 360 degrees) ... | |
| advenced algebra | 3/17/2008 |
| Q: A curveball is pitched with a speed of 64ft/sec. If the ball is thrown straight upward from a ... A: This question is about projectile motion. You can look up this topic on the web, there is a great ... | |
| Will you help us with this problem. | 3/12/2008 |
| Q: Based your level of Math expertise this should be very easy for you. Actually I do believe it is ... A: You are thinking that you are picking 1 out of 3 people for the first place, then, picking 1 out of ... | |
| Will you help us with this problem. | 3/11/2008 |
| Q: Based your level of Math expertise this should be very easy for you. Actually I do believe it is ... A: We can treat this as a combinatorial problem. For this question, however, I think it is easier to ... | |
| 5 choosing 3 | 3/10/2008 |
| Q: I was wondering how you would show, using tree diagrams, how to see how many options there are for ... A: As I elaborate on how this can be done, it would be useful if you could look at the tree diagram at ... | |
| Equations Involving Radicals | 2/27/2008 |
| Q: I am really struggling with these few. Is there anyway you would be able to check my work and help ... A: I'll do a couple to show you the way. You should then be able to attempt the remaining questions. ... | |
| Help!?!?! | 2/27/2008 |
| Q: Suppose that you take all of the black cards out of a standard deck of 52 cards and thoroughly ... A: It might be useful to draw some pictures initially until you get the hang of this. Basic ... | |
| Theoretical probability | 2/26/2008 |
| Q: I have done a 30 week table on a set of traffic lights on the probability of what colour they would ... A: Majella, It would be helpful if you told me whether you are solving this problem at a secondary or ... | |
| Retirement Calculation | 2/22/2008 |
| Q: An employee can retire from his place of employment if he meets the following requirements: His age ... A: Point #1: The number of years of service increases at the same rate as he adds years to his age. ... | |
| math | 2/19/2008 |
| Q: Doris spent 2/3 of her savings on a used car, and she spent 1/4 of her remaining savings on vintage ... A: No problem Jason. In algebra problems, whenever there is an unknown quantity that we need to find, ... | |
| A forgotten concept | 2/16/2008 |
| Q: So I'm in precalculus and for extra credit our teacher gave us a problem that involves remembering ... A: Without the specifics, I can only talk about this in general terms. I think the idea is to figure ... | |
| Division & Units | 1/31/2008 |
| Q: I have a question regarding division with units. 1) 6 gallons/3 = 2 gallons. Is this type of ... A: I am reluctant to say if any of them are "correct". As I mentioned last time, mathematical syntax is ... | |
| Statistics | 1/24/2008 |
| Q: How do i find the x value when i know the StdDev and the Mean? x-x bar / stddev. I need to find the ... A: I don't think it is possible to do what you have just described. In contrast with a "statistic", ... | |
| decimals | 1/24/2008 |
| Q: what are equivalents decimals and how do you compare them A: Re: "equivalent decimals"....it took me a while to get its meaning. Basically, given a fraction, we ... | |
| please help me... | 1/23/2008 |
| Q: 1. Lily Quinn makes $12.50 and hour. She works four hours on Monday, six hours on Tuesday, ... A: Scotty You can get away with a few questions, but you really need to make an effort and attempt ... | |
| equations in slope intercept form | 1/17/2008 |
| Q: a line who's change in y is 500 when x sub 1 =8 and x sub 2 = 17 A: I believe the vertical and horizontal axes are labeled x_2 and x_1. Why don't we call them y and x ... | |
| Adding Three Fractions | 1/17/2008 |
| Q: How do you add 2/5 1/6 1/4? I do not know the steps to finding a common denominator? Thanks! A: Ramonia, To add fractions, we need to express each one in terms of a common denominator. Otherwise, ... | |
| Percentages & Sales Tax | 1/16/2008 |
| Q: If the sales tax on merchandise sold in stores is 6%. The item is multiplied by the sales tax of 6%. ... A: 1. The multiplier in front of the amount should be a scalar quantity. I know that tax rates are ... | |
| solving multi step equations | 12/21/2007 |
| Q: ..im dealing wid questions like 2m plus 12 equals 3m minus 31....HELP! lol im so confused and please ... A: No worries. You use the same tools you have previously learned. When you have an equation like ... | |
| Density | 12/19/2007 |
| Q: I cannot figure out this problem! Find the density of a material that has a mass of 2 kg and a ... A: Lesley, Density is calculated by dividing mass with volume. Physically, it tells us how dense a ... | |
| Algebra/Cal | 12/19/2007 |
| Q: Consider the sequence that begins 4,3,... and continues by the rule: Every subsequent element of ... A: I am not sure whether you find the idea difficult to understand, or the notations difficult to ... | |
| Algebra/Cal | 12/18/2007 |
| Q: Consider the sequence that begins 4,3,... and continues by the rule: Every subsequent element of ... A: Part A: We need some notation to describe this sequence properly. Let x[n] be the nth term. With ... | |
| math | 12/13/2007 |
| Q: marys pace maesures 35 cm. If she walks 2,000 paces, how many meters did she walk A: This problem is about multiplication and unit conversion. We should first of all convert centimeter ... | |
| Applications of Trigonometric Functions | 12/12/2007 |
| Q: Determine the period 1. y = tan (b/2 x) 2. y = tan 2x 3. y = sec 4. if cos x = 1 what is the value ... A: The word "period" derives from the fact that the oscillatory waveform of a sine (or cosine) function ... | |
| Mean and Standard Deviation | 12/11/2007 |
| Q: Let n be any odd whole number. a) Which has the greater mean: the odd whole numbers from 1 to n, or ... A: a) No, actually both the odd sequence 1 to n and even sequence 2 to n-1 have the SAME mean (1+n)/2. ... | |
| Mean and Standard Deviation | 12/10/2007 |
| Q: Let n be any odd whole number. a) Which has the greater mean: the odd whole numbers from 1 to n, or ... A: Part a) describes two arithmetic sequences with a difference of 2 between consecutive terms. To ... | |
| word problem about work | 12/10/2007 |
| Q: Rick and Juanita complete a job together in 6 hours. It takes rick 9 hours longer than Juanitia to ... A: Let us assume that Rick and Juanita work at a rate of R1 and R2 respectively. Working independently, ... | |
| Maths. Perpendicular line | 11/27/2007 |
| Q: I have read a number of ways to try and work out this question but i just cant do it! Need help ... A: Katie, First thing is to work out the gradient (slope) of the line from the equation 3x+2y=5. We ... | |
| Finding a Break-Even Point | 11/26/2007 |
| Q: A company that manufactures bicycles has a fixed cost of $100,000. It costs $100 to produce each ... A: Dean, The cost function consists of two components. A fixed cost (let's call this C1) and a ... | |
| Math | 11/26/2007 |
| Q: Find the real solution of the following equation. 0 = (x + 68)(x 2 + 99) A: We need to find values of x which satisfy this equation, restricting our search to only real ... | |
| solution set of equations | 11/24/2007 |
| Q: sir please tell me that what will be the solution set of two parallel lines? do they have 1) finite ... A: Aliya, According to the definition given in [1], a solution set is a set of possible values that a ... | |
| Car Engine's Angular Speed | 11/20/2007 |
| Q: The engine of a sports car rotates at 5,000 revolutions per minute (rpm). Calculate the angular ... A: The conversion formulas we need are: 60 second/minute OR 1/60 [min/sec] 2*pi radian/revolution ... | |
| Angles | 11/19/2007 |
| Q: At what time between 2:00 o'clock and 3:00 o'clock, to the nearest second, do the hour and minute ... A: We just need to remember there are 60 seconds in a minute; and 60 minutes (60 x 60 = 3600 seconds) ... | |
| standard form | 11/19/2007 |
| Q: 0.3 - 0.4y =7.5 in standard form A: The key question is - what is the "standard" form? This must be something introduced previously in ... | |
| Angles | 11/18/2007 |
| Q: At what time between 2:00 o'clock and 3:00 o'clock, to the nearest second, do the hour and minute ... A: Jennifer, Maths problems can be solved in many ways. One way of looking at this is that the hour ... | |
| maths | 11/18/2007 |
| Q: i would be grateful if you could help me understand this question better. The question is, What is ... A: The reciprocal of a fraction is also called the inverse. When we take the reciprocal of (7/4), we ... | |
| Angles of a Triangle | 11/17/2007 |
| Q: If two angles of a triangle have the measurements of 92 degrees 17 minutes 23 seconds and the other ... A: Jennifer, To answer this question, we need to know two things: 1) The angles inside a triangle add ... | |
| polar coordinates | 11/17/2007 |
| Q: I am unsure about how to write equations for lines in polar coordinates and I am unsure about it ... A: One way of looking at this is that we are rotating the line by an angle theta (q). The problem can ... | |
| polar coordinates | 11/16/2007 |
| Q: I am unsure about how to write equations for lines in polar coordinates and I am unsure about it ... A: The vertical (y) axis and horizontal (x) axis splits the x-y plane into four quadrants. Measuring ... | |
| Find the reference angles q for the angles given below. Find the quadrants in which the angles lie. | 11/16/2007 |
| Q: 1. q = 50 degrees 2. q = 120 degrees 3. q = 6p/7 4. q = 3.3 5. q = 300 degrees 6. q = -145 ... A: By "reference angle", I assume you mean restricting the angle to the range which extends from -90 to ... | |
| Mixed Numbers & Decimals | 11/15/2007 |
| Q: Consider the percentage 25 1/3%. This equals (25 1/3)/100 and expressed as a decimal equals 0.25 ... A: Kenneth, I am not sure that we need a proof, but this is how I see it. Consider 25 1/3. What is the ... | |
| Triangle | 10/28/2007 |
| Q: Two vertices of an Isosceles triangle are (-5,4) and (3,8). The third vertex is on the x-axis. Find ... A: Best we to see this is to draw a diagram. Draw the x,y axes on a piece of paper. Mark the two ... | |
| calculator | 10/28/2007 |
| Q: where the instruction book is and i dont know how to make it so that it shows answers as x10^n ... A: I can offer two solutions to this problem. 1. Understanding what the scientific/engineering ... | |
| question | 10/25/2007 |
| Q: why did we call math mother of all sciences? A: Because mathematics provides the basic tools for understanding, analyzing, modeling and solving many ... | |
| important question | 10/22/2007 |
| Q: how math was introduced? A: This question is way too deep. No simple answer can do it justice. Like any branch of science, ... | |
| Maths | 10/22/2007 |
| Q: Rewrite the question without using mnus plus and times signs this is an example 5xk ???? A: Are we allowed to use brackets? Is this something that you have learned? Although it is somewhat ... | |
| compound interest and applications | 10/19/2007 |
| Q: carbon 14 dating. If the initial sample contains 4 grams of carbon 14, how much will be left after ... A: Debbie, The amount of carbon 14 at time t is governed by an exponential equation. The equation is ... | |
| Point-Slope Form of the Equation of a Line | 10/12/2007 |
| Q: For each line, use the given conditions to write an equation in the point-slope form and the ... A: For a straight line, the equation may be obtained in one of two ways: Slope-intercept form: Given ... | |
| division | 10/9/2007 |
| Q: if sum is the word used to describe the answer of addition, and product is the word for the answer ... A: Good question Dave! Let's look at an example. Suppose we consider 13/3. Obviously, 13 = 3*4+1. The ... | |
| algebra/math | 10/8/2007 |
| Q: Help with inequalities! Here it goes: The amount of snow on the ground increased by 8 in. between 7 ... A: Briahna, The information might be incomplete. All we know is a net increase in snow of 8 inches in ... | |
| math | 10/8/2007 |
| Q: 2x>y & y>x+2, I am having difficulty graphing this equation. A: Tina, We first look at these expressions leaving inequalities aside. If you consider the equations ... | |
| parabolas | 9/16/2007 |
| Q: I'm having trouble figuring out how to calculate the formula for a parabola from a graph. I would ... A: This can be done in a number of ways. Here are some of the things to look out for. a) Concavity: A ... | |
| fourier series | 9/1/2007 |
| Q: sir can u plz help in fourier series.. i just wanna know how to recognize even and odd terms in the ... A: Sorry about the delay. I actually answered this question three days ago, but for some reason my ... | |
| fractions | 9/1/2007 |
| Q: if i had 1 1/3 cups of sultanas and 4 people wanted some, how would i divided them evenly, what ... A: Do not be confused by fractions. It is just a number which represents an amount of something. The ... | |
| Fractions & Decimals | 8/29/2007 |
| Q: The fraction, 1/2, in 0.25 1/2 occupies the 1/100 place alone with the 5 in 0.25. Why doesn't the ... A: Mixing decimals with fraction is just absurd. It may be used in financial reviews, but it is ... | |
| x/4 + y/4 = 10 What is percentage of... | 8/28/2007 |
| Q: I am in my forties and working to sit the GMAT. I've managed to work all sorts of questions out but ... A: To express "x-y" as a percentage of "x", we consider the ratio 100*(x-y)/x. The problem here is not ... | |
| fractions | 8/22/2007 |
| Q: how would you add 16/20 & 3/9, do you simplify first then multiply then add then simplify again, if ... A: We can only add fractions directly when their denominators are the same. So, we first need to find ... | |
| Critical math. | 8/16/2007 |
| Q: On what day of the week and at what time does a 555 hour competition start if the competition has to ... A: There are 24 hours each day. Dividing the "number of hours" by "hours per day", we get 555/24, ... | |
| Easy Questions-but i cant..HELP!!! | 8/16/2007 |
| Q: Three soccer teams A,B and C played against each other. A game could be won, tied or lost depending ... A: I don't have all the information needed to give you a definitive answer. But you should approach the ... | |
| percentage into fraction | 8/10/2007 |
| Q: how do i turn 33% and 9% into a fraction and are their any percentages that the denominator remains ... A: A percentage point is equivalent to 1/100. So, we can represent 33% with the fraction 33/100, which ... | |
| math | 8/6/2007 |
| Q: I need your help.If it takes 50 eggs to bake 90 cakes using a large commercial bakery's recipe.using ... A: This problem is solved using a technique called cross-multiplication. We translate the statements ... | |
| math | 8/2/2007 |
| Q: solve for x in the following: 3 14=x 84 a.x=16 b.x=17 c.x=18 d.x=19. A: What does the question actually ask for? The part with "3 14=x84", do you mean Question Three: ... | |
| quadratic expressi on | 7/27/2007 |
| Q: z2-14z + 49 z=2 to the second power A: I'm not sure what the question is asking. Are you saying that z=2^2 and we have to evaluate the ... | |
| speed of light | 7/18/2007 |
| Q: In 1054, Chinese astronomers observed the light from a supernova in the night sky. This supernova ... A: Sean, To answer this precisely, we need an accurate model for celestrial movement to determine the ... | |
| budget | 7/17/2007 |
| Q: Problem Upon completion of his degree, Michael is hired as a technician at the rate of $900 every ... A: The answer may vary depending on the assumptions we make. Roughly speaking, there are 52 weeks in a ... | |
| The Speed of Light | 7/13/2007 |
| Q: 1. Solve the equation abx = cy for each of the following: a. the variable x Answer: Show your ... A: Aaron, You need to try this yourself to gain any benefit from it. Ultimately, you will be the ... | |
| Thermodynamics | 7/12/2007 |
| Q: Which would require more heat, melting 500 g of 0 C ice or turning 500 g of 100 C water into steam? ... A: We need to compare the amount of heat required to melt 0.5 kg of ice at zero degree Celsius, to the ... | |
| The Motion of Fluids | 7/12/2007 |
| Q: Solve each of the following for the variable y. 1. 3y = ab Answer: Show your work: 2. ab= ... A: Mike, You need to try this yourself to gain any benefit from it. Ultimately, you will be the person ... | |
| Fractions & Prime Numbers | 7/11/2007 |
| Q: Can a fraction be a prime number? If not, why, and if none are prime numbers, are they considered ... A: Can a fraction be a prime number? > In general, the answer is no. But I guess you could argue that ... | |
| Distance, Rate, and Time | 7/10/2007 |
| Q: A businessman drives from Washington, D.C. to Boston, a distance of 442 miles, and then makes the ... A: While the wheels are moving, the time (t) taken to cover a distance D at a speed of S is given by ... | |
| surds | 7/5/2007 |
| Q: i need to simply leaving the denominator rational 10squareroot3 divided by squareroot of 5 surds i ... A: Given [10*sqrt(3) / sqrt(5)], we can multiply both the numerator and denominator by sqrt(5) without ... | |
| Trigonometric identity crisis | 7/5/2007 |
| Q: can you help me to verify this trigonometric identity? I've used the 8 basic ones to substitute in ... A: No need to panic:) The first step I would take is to write the cosine terms as sine. Since ... | |
| math for life | 7/3/2007 |
| Q: I'm wondering if you can name some great books on math for non-mathematicians. There are two types ... A: I don't have books to recommend as such. However, I know the department of mathematics at St. Andrew ... | |
| problem solving | 7/3/2007 |
| Q: The kitchen floor of your home is 12’6” in width and 10’4” in length. You have decided to put in a ... A: Since 1 ft = 12 inches, for the second part, 4/12 = 1/3 ft. 12'6" = 12 1/2 ft 10'4" = 10 1/3 ft 1. ... | |
| ages | 6/30/2007 |
| Q: Translate each of the following into a mathematical expression. 1. The variable x is 4 less than ... A: 1. "x is four less than y" is same as "y is four more than x" We have y=x+4. You can write this as ... | |
| binary numbers | 6/30/2007 |
| Q: Express the decimal number 4693 as a binary number A: Let's write down the powers of two starting with 2^10=1024. 2^12=4096 2^11=2048 2^10=1024 2^9=512 ... | |
| math | 6/29/2007 |
| Q: how do you convert miles into minutes. for example how many minutes do it take for you to drive a ... A: "Mile" is a measure of distance, whilst "minute" is a measure of time. These two units are ... | |
| application problem | 6/29/2007 |
| Q: while driving to houston sumiran drives 1st one and half hour at a constant speed of 70 miles/hour. ... A: We have to find "x" and "y" (i.e., x 5 Mb songs and y 6 Mb songs) such that 5x+6y is maximized, ... | |
| application problem | 6/26/2007 |
| Q: while driving to houston sumiran drives 1st one and half hour at a constant speed of 70 miles/hour. ... A: The total distance D=400 miles must be covered in T hours. T=T1+T2+T3, where T1=1.5 hours, T2=1 hour ... | |
| land size | 4/26/2007 |
| Q: Could you tell me what the land size 240m2 would be in feet please A: 1 ft = 0.3048 m Since 0.3048 x 0.3048 = 0.09290304 1 square feet = 0.09290304 square meter Dividing ... | |
| Intermediate Algebra | 4/25/2007 |
| Q: My problem is 12 third root 5 over third root 5 + third root 2. I tried to pull out the 12 and put ... A: According to your description, the expression is probably [12*5^(1/3)]/[5^(1/3)+2^(1/3)], where ... | |
| maths | 4/20/2007 |
| Q: A drop of oil (volume 0.05cm3) is released from a medicine dropper on to the calm surface of a pond ... A: The spread covers a circular area of 40 m^2. Equivalently, this area covers 400,000 cm^2 (since 1 ... | |
| algorithmic division | 4/20/2007 |
| Q: I was wondering if you could help me w/ these two division problems at that bottom...I'm sure you'll ... A: Doing long division using the keyboard is not easy in this medium. Let D(n) be the dividend, S be ... | |
| please help me | 4/19/2007 |
| Q: question 1: If a,b,c are the roots of the equation x^3-7x^2+x+5=0; find the equation whose roots are ... A: Q1. If a,b,c are the roots of the equation x^3-7x^2+x+5=0, they will all satisfy the equation. So, ... | |
| algebra | 4/17/2007 |
| Q: could you help me with these y=4+2x x-3y=0 y=3x+5 A: Caroline, You need to tell me what the question asks for. I cannot help you with ploting graphs, ... | |
| Derivations | 4/17/2007 |
| Q: Derive? 1. cos 3x 2. sin 4x 3. cos 4x A: Let me show you one, you can attempt the rest yourself. Remember that ... | |
| Calculus | 4/12/2007 |
| Q: If V is the volume of a cube and X the length of an edge Express dV/dT in terms of dX/dT. What is ... A: Assuming that T (let me write "t" instead) represents the time variable, the fact that dX/dt (the ... | |
| array | 4/7/2007 |
| Q: Please help me if you can my son brought this question home for homework and I don'know how to ... A: Connie, An example is needed to verify the meaning of an array. If this is about building a ... | |
| Inverse of 3/4 | 4/4/2007 |
| Q: In order to invert 4/3, simply invert the fraction to 3/4. However, 4/3 can be expressed as 1 1/3. ... A: This is because the inverse of the sum of two fractions is not the same as the sum of the inverse of ... | |
| Fractions/Word Problemzzzzz | 3/30/2007 |
| Q: Pauline's Piazza Service served 544 pizzas last week. 3/8 of the pizzas served had a mushroom ... A: First, note that 1/8 (one eighth) of 544 is 68. We are told that 3/8 of the 544 pizzas had a ... | |
| Mathhhhh | 3/29/2007 |
| Q: I am a the grader who is in desperate need of some help in math. If i don't do well i might sent to ... A: What grade did you say? I sympathize with your situation, but the problem is way bigger than what I ... | |
| Plane trigonometry | 3/23/2007 |
| Q: Can you please help me in solving these trigonometric problems : a)Verify the following identities ... A: Here are some pointers. For part a (i): You can use the t-substitution technique, where t=tan(x). ... | |
| pi | 3/22/2007 |
| Q: what's so significant about 'pi' and it's value? A: From a geometry's viewpoint, the circumference of a circle is given by two "pi" times the radius. ... | |
| exponets | 3/21/2007 |
| Q: Why when the exponet is 0 the answer is 1 A: exp(0)=1 is true by definition. If we let y=exp(x), it has an inverse function (natural logarithm) ... | |
| math | 3/17/2007 |
| Q: A family spends 20% of its monthly income on food, 23% on rent, and 42% on other expenses and saves ... A: General strategy: Assign a variable to represent the unknown quantity. Translate information into ... | |
| Percentages | 3/15/2007 |
| Q: ------------------------------------------- Yes, you have provided the correct solution. If I ... A: There are couple of things I should mention. In part 1: 0.40 (40/100) is 40%, not 4%. In part 3: ... | |
| Percentages | 3/10/2007 |
| Q: How can someone determine how he saved 40% on his grocery expenses? I thank you for your reply. A: I don't understand your question. Do you mean this -- given the discounted total, figure out the ... | |
| probaility | 3/10/2007 |
| Q: three dice and three coins are tossed, what is the probabiltiy that the coins will all be the same ... A: Let's look at these one by one. When we toss each coin, there are two possible outcomes (either ... | |
| proving | 3/9/2007 |
| Q: how i can prove this: (Exist a X)(For All Y) P(X,Y) => (For All Y)(Exist a X) P(X,Y) this is ... A: I thought about the symmetry property, viz. P(X,Y)=P(Y,X). But when I look at this more carefully, ... | |
| probabilities | 3/9/2007 |
| Q: In golf a common way to determine partners is to throw a ball from each person into the air and ... A: The first description involves tossing four balls and watching where they land. If we use x(1), ... | |
| Story Problem | 3/3/2007 |
| Q: A Man rode his bike 300 miles. Three tires were used equally in the trip. How many miles of travel ... A: Let the miles of travel for the three tires be x, y, and z, respectively. They have to add up to ... | |
| math | 3/2/2007 |
| Q: HOW DO I ADD AND SUBTRACT FRACTIONS? A: It's not easy to talk about fractions without some numerical example. Suppose we want to add 1/4 ... | |
| physics | 2/23/2007 |
| Q: Question a perfectly insulated container contains 70 g of water at 40 oc. A small heater is ... A: This question is about using electrical energy to heat a substance. Assuming no loss of energy ... | |
| Conversions while using the metric system | 2/15/2007 |
| Q: I need to convert mm to um. 1.75mm = 1,7500um. Is that correct? 40cm = .4m Am I moving the decimal ... A: I think there's a typo in your question. I believe you've got it right, 1.75 mm [millimeter] = 1750 ... | |
| monthly payment | 2/14/2007 |
| Q: If I wanted to buy a $45,000.00 car and I put down a 10% depost.Borrow the rest at a 3% interest ... A: The amount of money you borrow is 90% of $45k, i.e., $40500.00 The formula for your monthly ... | |
| geomerty | 2/13/2007 |
| Q: i am confused about this problem, and i need help please!!!! it says: two similar polygons have a ... A: Your reasoning is correct. The answer depends on what the scale factor refers to. Assuming that it ... | |
| maths | 2/12/2007 |
| Q: A packaging company are designing new feature cartons with a uniform ( equilateral triangular cross ... A: Suppose the side of the equilateral triangular cross-section has length x. Imagine that the triangle ... | |
| series | 2/11/2007 |
| Q: I would like to know the name of this series and how I could get more information on it. Here is an ... A: I don't know if a name is ascribed to this sequence. However, we can describe this sequence as being ... | |
| Distance | 2/10/2007 |
| Q: Josh, how much farther would I have to run on certified college, 400 meter, track to equal a full ... A: Mr. Weston, One mile is the same as 5280 feet (1609.34 meter, or 1.60934 kilometer) This distance ... | |
| evaluating expressions with decimals | 2/6/2007 |
| Q: how do you write an expression for total salary for h hours of work if he is paid 8.25 per hour? how ... A: For part 1: The total salary (S) is given by the product of "salary rate" (R) and the "duration of ... | |
| compound interest | 2/4/2007 |
| Q: If you open an interest bearing checking account and you deposit $180,000 with interest of 0.05 ... A: Key thing to note is that interest is compounded daily. In one year, the deposit would have been ... | |
| Math | 2/1/2007 |
| Q: Josh I need to solve the equation of turning celsius into fahrenheit. C=5/9(F-32) Thanks Rhonda A: To do this, we rewrite the equation making F the subject. viz., we want to isolate "F", leaving it ... | |
| Math | 1/30/2007 |
| Q: i want to know the solution set of square root of X = -3 Thanks, Manzar A: Suppose that X=r[cos(w)+j*sin(w)], where j=sqrt(-1). Using periodicity, it is also true that ... | |
| Math | 1/29/2007 |
| Q: If Lynn can type a page in p minutes, what piece of the page can she do in 5 minutes? 5/p ... A: Jonathon, We can represent this work rate (one page every p minutes) as 1/p, measured in ... | |
| Adding functions - 11 grade algebra | 1/24/2007 |
| Q: trying to help my son and it has been too many years. Given the functions f(x)=3x-4 & g(x)=2x+3. ... A: Yes, that's the idea. (f+g)(x)=f(x)+g(x) There is probably a typo though. If f(x)=3x-4, then, ... | |
| PERFECT NO. | 1/23/2007 |
| Q: Gud day Sir, aside from 6 and 28 what are the other perfect nos. (if there's any), i tried to ... A: G'day Leonard, Perfect numbers (n) have the property that the sum of all divisors of n equals 2n. ... | |
| Need a refresher..... | 1/20/2007 |
| Q: I am looking for some help in solving for "x" in the following 2 equations: 265(1+x)^2 = 307 ... A: No problem Jake. The key thing to remember is that an exponential function is inverted by a ... | |
| Compound Interest Formula | 1/18/2007 |
| Q: Can you explain the compound interest formula? Let's say that an investor has $1000.00 to invest ... A: For this derivation, let P be the principal, r be the interest. (If interest is R%, r=R/100) Write ... | |
| Bank Discount Loans | 1/4/2007 |
| Q: I want to thank you for your quick reply and answer. I am having some difficulty understanding the ... A: Regarding Q1 Yes, I think you are right. Even though the borrower does not actually pay the $18 out ... | |
| Parabolas | 1/3/2007 |
| Q: I can't figure out how to do this problem. A parabolic mirror is placed on the floor. It measured 30 ... A: First thing we should do is draw a diagram. A.....B.....C . . ......D The parabolic curve passes ... | |
| Bank Discount Loans | 1/3/2007 |
| Q: I recently read about a type of loan know as a bank discount loan in a business mathematics book. I ... A: > Don't pay $318 because borrower never received $318. > The loan has a face value of $300 although ... | |
| Mathematics | 12/3/2006 |
| Q: 1.I want to Find the amounts of each element in a 120 Ib.woman? How can I solve that question? A: When you say "element", are you referring to the chemical composition of the human body? e.g., if ... | |
| division question | 11/28/2006 |
| Q: What is the proper name for the division box? A: J.K. I will refer you to the examples given at the following website. ... | |
| Volume caculation | 11/18/2006 |
| Q: How do I caculate the amount of a gas that can pass through a 1 inch pipe at differnet pressures? ... A: Davis, The following is an explanation of the formula. I believe you also need to take into account ... | |
| Fourier Series | 11/16/2006 |
| Q: so if it asks a graph for function of period 2pi which is defined by f(x)=x in o<x<pi and is odd in ... A: I plotted the odd and even functions. Take a look at the pdf file ... | |
| a sequence | 11/16/2006 |
| Q: i have been trying to figure this sequence out for ages could you help? find the formula for the ... A: In short, I do not know what function would fit this sequence. In the time that I have, I can ... | |
| Fourier Series | 11/15/2006 |
| Q: If it says that a function f(x) is periodic with period 2 and is defined by f(x)=x in 0<x< , and is ... A: In the interval 0<=x<0.5*T, the function is described by f(x)=x. Here, T=2 is the period. If it is ... | |
| combination/permutation charts | 11/12/2006 |
| Q: I accidently reset my combination lock somehow (my laptop to a table), and now I don't know the ... A: Are you sure you didn't write the number down somewhere? If you have got the initial code partially ... | |
| can you help? | 11/10/2006 |
| Q: Well, here is my question. I was wondering, (this isn't any school thing or whatever, just curious), ... A: That's an interesting thought. Imagine "o" as the pivot of rotation and let "S" represents the space ... | |
| hey can you help me? | 11/6/2006 |
| Q: A bell rings every 2 hours, a second bell rings every 3 hours, and a third bell rings every 4 hours. ... A: I'll try:) Solving problem mathematically: Let A(n), B(n) and C(n) denote when the first, second ... | |
| trigonometry: sine law/ cosine law | 11/5/2006 |
| Q: My problem involves two composite triangles, PQR (smaller) and PQZ (larger), with the following ... A: My drawing looks like this: ..........Q . . . . P....................R...................Z The ... | |
| math | 11/3/2006 |
| Q: The quotient of 794.1 divided by 7.61,expressed as two decimal places,is? A: I can give you the answer (104.34), but it's difficult to explain the procedure in the present ... | |
| algebra | 11/2/2006 |
| Q: solve x over 4 + 5 = x over 2 + 1 A: Susan, If I understand correctly, we have the equation (x/4)+5=(x/2)+1. There are couple of options ... | |
| basic algebra | 11/1/2006 |
| Q: Can you tell me what this problem would be called? My son doesn't know and I want to get him help ... A: You are exactly right. This problem introduces the basic concept of algebra. The idea here, is to ... | |
| math | 10/24/2006 |
| Q: how do you write a decimal in word form? A: I'm not sure about your question. Do you mean how to translate a decimal figure into words? If so, ... | |
| simple interest | 10/23/2006 |
| Q: you borrow a total of $3000 for school. Part of the money you borrowed is from a credit union that ... A: There are two unknowns in this question. The amount borrowed from a credit union (at 8% interest) ... | |
| percentages | 10/18/2006 |
| Q: I am trying to figure out what the appraisal of my home needs to be. I need my principal to be 80% ... A: If the house costs you 1.365 million, and you want this to be 80% of the appraisal, then, the ... | |
| Common Multiples and Common Factors | 9/24/2006 |
| Q: hope you can help me. I am stuck with this word problem: Eric and his friends practice multiplying ... A: a) greatest product when two such numbers are multiplied together is 6*6 c) 7*7=49 unique ... | |
| Writing equasions of lines | 9/15/2006 |
| Q: I have 4 questions that I am not understanding how to do. The first one I have been working on for 2 ... A: Question 1 tests you on the following: 1) You need to know how to read the gradient (aka slope) of ... | |
| help me now | 9/14/2006 |
| Q: can u please tell me the odd intergers and even please A: Tahira, Odd integers are numbers from the sequence {1,3,5,7,9,11,13,15,etc.} Even integers are ... | |
| place value | 9/13/2006 |
| Q: what is the difference beetween place value and the the value of a digit in a number? the number ... A: The term "place value" has to do with how numbers are represented in the metric system. The metric ... | |
| Probability | 9/12/2006 |
| Q: Maybe, you will be know how do this exercises. I have two questions. Please... 1) "Find the ... A: For this question, I suggest that you write down various possibilities on paper. Sum of five can ... | |
| Problem of the week | 9/10/2006 |
| Q: This is a question for my 4th grader's gifted and talented class. The teacher stated that we are ... A: I recommend tackling this question using algebra. Yes, I know your child is in 4th grade; but any ... | |
| algebra | 9/8/2006 |
| Q: How do i set this up? The president of a supermarket chain plans to hire two public relations ... A: First, let's abbreviate the survey methods -- phone, mail and interview -- by x, y and z, ... | |
| Probability | 9/8/2006 |
| Q: Maybe you will be know the answer for this two questions, beacuse I have a problem with them. 1) ... A: Q1a) The probability of drawing 2 queens For the first pick, there are 4 queens (one from spade, ... | |
| cube root | 9/7/2006 |
| Q: I have tried many attempts to solve this for Gen. Chemistry. the question is: a perfect cube of ... A: Don't panic. Let's work this out step by step. Density = Weight/Volume. Given Density=2.70 g/cm^3 ... | |
| algebra/graphing | 9/7/2006 |
| Q: What is true about points with a x-value of 0? & What is true about points witha y-value of 0? A: A point may be represented by (x,y) on an x-y plane....[#1] Points with a x-value of zero are given ... | |
| quadratic equations | 8/31/2006 |
| Q: in this case just part of the equation -7y + 12/4 how does this simplify to -7/2 ? A: I don't see any connection between -7/2 and -7y+(12/4), or, is it (-7y+12)/4. The expression ... | |
| At 1139......? please help! | 8/30/2006 |
| Q: I'm so glad you are here to provide this service, I've been having a hard time figuring out this ... A: Cheryl, 1139 does not coincide with the latitude of any US states on the atlas. See ... | |
| math | 8/22/2006 |
| Q: im filling a study guide in and i forgot my book at school. i dont even get what to do or how to do ... A: The question relates to a result which states that any integer (whole number) can be factorized as a ... | |
| math convertion | 8/22/2006 |
| Q: i just join the food processing business... i have a machine which produce burger with a cylinder ... A: You've worked up quite an appetite in me. Burgers huh? What we need is the density which is defined ... | |
| Help preforming rotations on a cartesian plane, please ! | 8/18/2006 |
| Q: I am about to begin highschool, unfortunately I do not know how to preform rotations (clockwise and ... A: I think your question was addressed to Paul, but I'll answer it anyhow. In the following discussion, ... | |
| Algebra | 8/11/2006 |
| Q: I have a question that says: Find the equation, in standard form, with all integer coefficients, of ... A: The question asks us to find an equation for a normal (a line which is perpendicular) to the ... | |
| Combinations | 8/11/2006 |
| Q: There are 8 players on a basketball team. How many different 5 man taems are possible if each player ... A: This particular question falls within a broader class of questions, where you have to work out the ... | |
| simplify algebra | 8/9/2006 |
| Q: i'm not sure how to distribute the exponent 4 into(2x) A: Is your question about index law? e.g.1, x^4 = x^2 * x^2 = (x^2)^2 e.g.2, x^5 = x^2 * x^3 In ... | |
| tangents pre-calc | 7/31/2006 |
| Q: i was wondering if you could help me with this i don't know how to find the equations of tangents ... A: I think that you already know a great deal about tangents than you realize. Let us review a few ... | |
| Gas cost on trip | 7/30/2006 |
| Q: ok i need to figure out.. Im planing a trip to montreal. I live in ontario. I figured out the ... A: Katherine, The following website tells us about fuel economy for the 1994 Chevrolet Corsica v6. ... | |
| Parentheses & Brackets | 7/26/2006 |
| Q: Where should the parentheses and brackets be used in order to indicate the following calculations? ... A: Just want to say that I have actually replied to this question. Apparently, my reply didn't reach ... | |
| Area-related question... | 7/24/2006 |
| Q: Josh: A quick question regarding finding the area of an odd figure: If a straight line bisects a ... A: I understand your question perfectly. It's a simple question. But finding an expression for the area ... | |
| find the equation | 7/23/2006 |
| Q: i have read over the chapter for 2 hours and have no idea how to start this problem. if you earned ... A: The average earning of 25000 is irrelevant as far as our modeling is concerned. It is just a ... | |
| DEPTH OF TREAD | 7/21/2006 |
| Q: WHAT IS 4/32 INCHES IS THIS A QUATER OF A INCH ? PLEASE EXPLAIN.. THANK YOU A: 4/32 is equivalent to 1/8 (one eighth) of an inch. We know this because dividing the top and bottom ... | |
| weighted average | 7/19/2006 |
| Q: I need to calculate average cookie sales for different areas of the countrey. Example the central ... A: Val, You need to clarify what you are saying. The central division consists of three subdivisions. ... | |
| milligrams vs. grams | 7/19/2006 |
| Q: Did you say that there are 113 milligrams of sodium in a 113-gram carton? But did you take into ... A: With reference to the equation 95/57=x/113, x represents the amount of sodium in a 113 g sample. ... | |
| milligrams vs. grams | 7/16/2006 |
| Q: With regard to Morningstar Scramblers, there are 95 milligrams of sodium in a 57-gram serving size. ... A: I'm not sure if you received my reply. I remember having answered this question already. But I don't ... | |
| math | 7/11/2006 |
| Q: I am 7 my family is going on vacation, my job is to figure out how much it will cost for gas to get ... A: You asked an interesting question! Let me give you some help. To solve this problem, we need to ... | |
| >_< sines | 7/7/2006 |
| Q: my question has to do with sines and cosines. i dont really understand them at all, so i was ... A: Andrea, Sine and Cosine are functions which relate "the ratio between two sides of a triangle" to ... | |
| Coverting Currency Rates | 7/7/2006 |
| Q: I want to thank you for the reply. What is the mathematical logic for using the inverse of 115.68 ... A: The reason was given in the second line. Since 1 USD = 115.68Y, 1Y= 1/115.68 USD. The logic goes ... | |
| math | 7/6/2006 |
| Q: (4/5 + 2/3) - (1/5)with exponent 2 A: Kristie, The first step is to raise one fifth to the power of two. (1/5)^2=(1/25). So, the ... | |
| Basic Measurement Resources | 7/5/2006 |
| Q: My daughter is just about to commence the Diploma in Pre Enrolled Nursing in Adelaide Australia. ... A: Mate, Good to receive a question from an Aussie. I actually live in Sydney. When I did my HSC, I ... | |
| venn diagram | 7/2/2006 |
| Q: kindly give me a more like research problem that is applying venn diagram and solving it using set ... A: I can suggest a few links, but I can't give you an original problem off the top of my head. ... | |
| Calculating a weighted average. | 7/2/2006 |
| Q: I want to be reminded - from my distant statistics class - of how to calculate a weighted average of ... A: In the context of your problem, the weights are essentially given by the percentages of each ... | |
| Exponetial Growth | 6/28/2006 |
| Q: If the world's population grew by 2% in 1998 and continued at that rate, how long would it take ... A: Nicolette, To answer this, we refer to the exponential model. Let A be the population at time t=0 ... | |
| probabilities I think | 6/28/2006 |
| Q: I am about to take the GMAT and have not had math in quite some time. My study quide presented a ... A: You're on the right track. The thing you referred to (n!) is called a factorial. By definition, ... | |
| Solving Equations | 6/22/2006 |
| Q: 5x+5=30 - 7 A: There are probably two ways of interpreting your question due to the awkward placement of the ... | |
| work problem | 6/16/2006 |
| Q: It takes 6 workers 6 weeks to lay 1000 ft of pipe. How long will it take 8 workers to lay 1200ft of ... A: Here are my thoughts in relation to some of the comments you've made. It's a cliche, but practice ... | |
| work problem | 6/16/2006 |
| Q: A firm receives an important contract and hires 15 temporary workers in addition to its full-time ... A: The basic equation is W=Rt, where W is the amount of work done, R is the effective work rate of the ... | |
| math question | 6/14/2006 |
| Q: could you tell me if 0.217 is the same as 217,000 when wrote out. thanks A: The two numbers, even though both contain the digits "2", "1" and "7", are actually different by ... | |
| complete the series | 6/9/2006 |
| Q: Complete the Series… 1 1 1 2 1 1 2 1 1 3 1 1 2 ? ? ? ? ? ? Give logic in support of your ... A: There's no definitive answer to this question. The patterns can be rationalized in various ways. ... | |
| Logs | 6/7/2006 |
| Q: I need to solve 3 different log problems. 1) log(sub)8(n-3)+log(sub)8(n+4)=1 ... A: Okay Alex, let's go through these one-by-one. PART ONE In Q1, we have to find the unknown "n" which ... | |
| Algebra | 6/7/2006 |
| Q: They want the circumfrence of a circle where the radis is 21 usin r= 22/7, can you please help A: The circumference of a circle is given by 2*pi*r, where pi has a value close to 3.1415 (sometimes, ... | |
| sequence | 6/4/2006 |
| Q: i need help with thisconsider the sequence that begins 4,3,... and continues by the rule:Every ... A: Why don't you have a go at the question. The initial conditions are given by the first and second ... | |
| quadratic functions | 6/4/2006 |
| Q: I'm really stuck on this question-please help! The path traveled by a golf ball hit with a 9-iron ... A: Here is what you need to know. When given a function y=f(x) (like the quadratic in this question), ... | |
| find p | 6/3/2006 |
| Q: Find prime numbers p such that p p p X p p ----------------- p p p p p p p p 0 ... A: Moksh Aggarwal Asks Subject: find pFind prime numbers p such that p p p X p p ... | |
| Ratio | 6/3/2006 |
| Q: In what ratio two varieties of fruit juice costing Rs 8 and Rs 9 per litre respectively mixed , so ... A: This is a classic problem. The requirement is 8x+9y=8.3(x+y)....[#1] Here, x and y represent the ... | |
| Ordering, arranging etc. | 5/26/2006 |
| Q: Here are three piles of cans, each pile containing three can. There is a number on the can which ... A: This problem can be solved by graph theory and path finding algorithms, which are difficult subjects ... | |
| Complete the series | 5/25/2006 |
| Q: Replace the ? with appropriate number- Q.1) 18, 14, 12, 11, ?, 10.25 Q.2) 5, 23, 113, 523, ? Q.3) 8, ... A: Q2 involves a logarithmic function. It is hardly a fair question to ask, since it is not obvious ... | |
| Logical Maths | 5/25/2006 |
| Q: Find an 8 digit no. whose 1st digit tells how many zero(s)are there, 2nd tells how many one(s)are ... A: If we write the number as "abcdefgh", for this to be a legitimate number, at the very least, the sum ... | |
| numbers couple to a set of letters | 5/24/2006 |
| Q: I have scoured the information superhighway attempting vigourously to find anything related to this ... A: Well,...that depends. For the ordinary person, it probably represents nothing more than a password ... | |
| DEVIRATIVES | 5/22/2006 |
| Q: this is my last question by the way. ok, here goes: B /I 5 / I 3 / I A /---I C ... A: Let x be the angle ^ABC. sin(x) is the ratio between the opposite side (from the point of view of ... | |
| trigonometry | 5/20/2006 |
| Q: I am stuck on this confusing question and I need help. As a lumberjack, you attach a 50-foot wire ... A: Try translating the word problem into a picture. P | | | | G-------------------S Here, P denotes ... | |
| Weighted avgs when basis is different | 5/19/2006 |
| Q: Josh. Your response has prompted three questions from me regarding "normalizing" the scores before ... A: Re: Q1 I chose 0 for "No" and 4 for "Yes" for a reason. If 1 and 5 are assigned to "No" and "Yes", ... | |
| basic math | 5/19/2006 |
| Q: there are 75 envelops in a package. how many envelops are there in 7 packages? A) 552 B) 10r2 C) 525 ... A: Krissy, The answer is given by 75 times 7. This is because you have seven packages, each having 75 ... | |
| Weighted avgs when basis is different | 5/18/2006 |
| Q: Josh: I am trying to come up with a weighted average scoring system for survey questions on ... A: Jeff, Let me try answering your questions, then I'll make some suggestions. Q: Is it ... | |
| Area... | 5/18/2006 |
| Q: Josh: Is there a "catch-all" formula for finding the area of a very irregular shape? I've got to ... A: David, I'm afraid there isn't. It's a good idea to conduct some measurement. Or perhaps, you can ... | |
| trigonometry | 5/18/2006 |
| Q: i need help on thisWhile fishing on a local lake, you see a fish below water at a 25 degree angle ... A: Hannah, It'd be best if we draw a diagram. This is what i used to do, to help me visualize what's ... | |
| Math | 5/17/2006 |
| Q: I have busted my brain and can't figure out this answer. if the wheels on a bike are 25 inches how ... A: To answer this question, we need to convert between two length measurements, viz., "mile" and ... | |
| algebra | 5/15/2006 |
| Q: how do u find the x and y int of an equation A: Given a function of x, f(x) or y, to find the x-intercept, you set f(x)=0. The y-intercept is found ... | |
| geometry | 5/15/2006 |
| Q: i am confused on this question, very simple though: the sum of the interior angles of a convex ... A: You may have learnt that the sum of the interior angles in a triangle add up to 180. e.g., A . . ... | |
| application problem Math | 5/13/2006 |
| Q: Please help me solve this problem Sept. $4,200 Oct. 18% more than Sept. Nov. and Dec. 10% more than ... A: The string of numbers is quite hard to read, it looks rather like the mathematical equivalent of a ... | |
| profit and graphs | 5/11/2006 |
| Q: Profit=sales-cost sales=4x cost=1.50x+1,475 1.50x=#of candles sold 1,475=mnthly bills profit=2.50 ... A: Okay, we are told that sales = 4x and cost = 1.5x+1475 Using the formula, i.e., substituting for ... | |
| Word Problem | 5/11/2006 |
| Q: I have a question that I am having some difficulty solving. Perhaps you can find the solution. It is ... A: I suggest that we assign a variable to each of the unknown and relate the ages through algebraic ... | |
| Poker Question | 5/7/2006 |
| Q: I want to know what my average placement percentile is. By this I mean I want to know how good I am ... A: Percentile bands may be expressed in a number of ways. For instance, the following percentiles ... | |
| Maths | 5/4/2006 |
| Q: I am a senior citizen and have a website on which I post a questions and answers segment. A book ... A: It's never too late to learn. I applaud you for your efforts and in finding something meaningful ... | |
| Mathematics | 5/1/2006 |
| Q: Here is the problem: A CATTLE FARMER has 1000 meters of fencing and wants to fence in the largest ... A: Let me assure you that your method is technically correct. The reason for the difference has to do ... | |
| maximum distance | 4/29/2006 |
| Q: I think I'm doing pretty well thanks to your great explanations. I do have one more question which ... A: Hey Jeff, How did you go in the AP exam? I guess you must be taking everything in your stride. ... | |
| Math | 4/29/2006 |
| Q: A river is 760 feet wide and is spanned by a bridge. One-fifth of the bridge stands on one side of ... A: Always assign a variable to the unknown quantity. In this case, let the length of the bridge be "x". ... | |
| a maths question, answer as much as you can, | 4/28/2006 |
| Q: http://www.geocities.com/uttoransen/questions.doc Answer - I prefer not to open Microsoft and other ... A: Q1) If a,b,g are the roots of the equation We have k(x-a)(x-b)(x-g)=0, where k=1. Expanding this, ... | |
| problem solving | 4/27/2006 |
| Q: An antelope has been observed to run 35mph ove a distance of 4 miles. How long did it take to cover ... A: Dylan, First, let's understand what the symbols (also called "variables") in the formula represent. ... | |
| Polynomials | 4/24/2006 |
| Q: I need to find the answer to three questions- these ones I am struggling with They are all T and F ... A: 1. A monic polynomial has a leading coefficient of 1. Some examples include x^2+2x+1; x^3-2x+4; ... | |
| Percentages | 4/19/2006 |
| Q: I want to thank you for the follow-up reply. It did answer my question; however, I now an curious to ... A: The answer is "no". It is a matter of tipping the balance towards a higher return. Since the ... | |
| Percentages | 4/18/2006 |
| Q: In the question that I sent to you, there is the amount of $30,000. This amount is to be divided ... A: "This overall rate of 4% is twice as close to the 5% rate as it is to the 2% rate." Can you explain ... | |
| Percentages | 4/17/2006 |
| Q: Can you explain the following? If the overall rate of return is 4% on an investment of $30,000 and ... A: I like to give a number to the unknown amounts for the 5% and 2% investment. Let these be "x" and ... | |
| multiplication | 4/17/2006 |
| Q: My question is relatively simple. Why is -1 * -1 =+1 ie why minus * minus makes plus? A: We generally cannot think of negative numbers as a physical entity. There is no intuitive ... | |
| Math Help | 4/14/2006 |
| Q: I need the help with the following questions 1. The graph of the equation 2x-y+4=0 crossed the x ... A: Q1. The given equation has the form a*x+b*y=c, where a=2,b=-1 and c=-4. So, it represents a straight ... | |
| solving rational equations | 4/11/2006 |
| Q: I really am stuck and can not get a hold of my professor so here goes the problem is x/6+3/4=x-1/4 ... A: It's better to use parenthesis when writing fractions on a single line. From ... | |
| Probability | 4/8/2006 |
| Q: Kim and Susan are playing a tennis match where the winner must win 2 sets in order to win the match. ... A: Okay Kevin, first let us figure ways of winning. Then, calculate the associated probabilities. ... | |
| Math | 4/6/2006 |
| Q: y = -2 over 3x - 2 A: You have given me a maths expression, but what does the question actually ask? Do you have to ... | |
| Probability | 4/6/2006 |
| Q: A Radio station WQXP has 10% of the market in Raleigh and 40% of the market in Garner. Of the total ... A: Kevin, Let P(R)=0.1 and P(G)=0.4 be the station's market share in Raleigh and Garner, respectively. ... | |
| Missing Factors | 4/4/2006 |
| Q: I want to thank you for the reply; however I'm confused! I'll try to make it simple as I can as to ... A: As far as I can see, you have two choices. Solutions can be found by trial and error, this requires ... | |
| Can you folks help me with... | 4/3/2006 |
| Q: Can you folks help me with a little bit of math. This has to do with a specification of printing ... A: Consider the interval [80,98] (i.e., from 80 to 98). The nominal range is R=18. Under this new ... | |
| Missing Factors | 4/1/2006 |
| Q: I want to thank you for the follow-up reply. In my calculation, I want it to be so that the missing ... A: I had the answer written two days ago. Due to internal server problems, I had not been able to post ... | |
| Missing Factors | 3/31/2006 |
| Q: I want to thank you for the reply and answer. I'll try to be less confusing with this follow-up ... A: To solve (1/2 X ____) + (1/4 X ____)/20 = 6/20. Focus on the numerator in the expression [(1/2)*a + ... | |
| Missing Factors | 3/29/2006 |
| Q: By using the information provided from the following calculation, 1/2 , 1/4, 6, 20 and 30%, is it ... A: I am a little confused by your question. You want to fill out the blanks...Is that the question you ... | |
| Trigonometry | 3/28/2006 |
| Q: I have a worksheet that asks me to Prove each Identity of: (tan a - tan b)/(tan a + tan b) = sin ... A: This question requires you knowing the following entities: sin(a-b)=sin(a)cos(b)-cos(a)sin(b) ... | |
| Baffled! | 3/27/2006 |
| Q: i hope you can help with the following i can not work it out: There are eight doors in a row. Behind ... A: Let's summarize this information. Let n(1),n(2),...,n(8) represent the numbers hidden behind each ... | |
| Conic Sections | 3/25/2006 |
| Q: I need to explaine how curves can be created geometrically and are conic sections functions? I am ... A: Sherry, Curves such as parabola, ellipse, hyperbola are all produced by taking a cross section ... | |
| BASIC MATH QUESTION | 3/19/2006 |
| Q: Lu Na's car gets 37 miles to the gallon on the highway. How many kilometers per liter does she get ... A: Bill, Essentially, this question asks you to find the equivalence of 37 [miles]/[gallon] in terms ... | |
| Combinations | 3/16/2006 |
| Q: An NFL coach sometimes uses a defense that utilizes 5 defensive linemen, 3 linebackers, and 3 in the ... A: This question may be generalized as a "Pick k from K", then "Pick m from M", then "Pick n from N" ... | |
| Maths question | 3/15/2006 |
| Q: An indian railway train has troble asending certain hills and has to ensure that the incline ... A: It's nice to know that some parts of the question makes more sense to you now. Again, to make ... | |
| Rates & Fractions | 3/10/2006 |
| Q: I appreciate your efforts in attempting to answer my question. I, however, am somewhat confused by ... A: Don't be upset. I am not saying that attaching units to numbers is always pointless, but I just ... | |
| Rates & Fractions | 3/9/2006 |
| Q: If 3 people can rake a yard in 7 hours, how long will it take 5 people to rake the same yard? ... A: Matching units somewhat arbitrarily is rather pointless in my opinion. That's not the way I would go ... | |
| mental computational question | 3/3/2006 |
| Q: a truck can hold 1000 (one thousand) litre of petrol . it want to transfer as many as it can to a ... A: I would think that the truck will never make it to the destination. If it loses 1 litre of fuel for ... | |
| trigonometry | 3/2/2006 |
| Q: tan + cos / 1 + sin = sec A: Steve, With fractions displayed on a single line, you really need to use parentheses to indicate ... | |
| Least common multiples | 2/28/2006 |
| Q: How do I find the least common multiple of three or more numbers A: The following is a two-step procedure for finding the least common multiple. Step 1: Factorize each ... | |
| Fractions & Word Questions | 2/27/2006 |
| Q: How is the answer determined for the following? If possible, use a simple calculation. One worker ... A: Let J be the amount of work done per job. Let R(n) be the rate at which work is carried out by ... | |
| simplifying rational expressions:finding the LCD | 2/21/2006 |
| Q: 3k / k-2 + 6 / 2-k? I don't even know where to start. Could you please help. Thanks> A: Fatima, It is really important that you put brackets around expressions when you are writing ... | |
| Math | 2/21/2006 |
| Q: Tracy's dog eats 8 ounces of dog food every day. How many pounds of dog food will her dog eat in 40 ... A: Given that the dog consumes 8 [ounces of food] per day, how many ounces of food is consumed in 40 ... | |
| Solutions of Equations | 2/20/2006 |
| Q: Help, 28 -6(2x +4)=124 My daughter is in 8th grade and is having problems solving this problem. ... A: Okay, expand the left hand side of the equation (i.e., multiply out). 28-6(2x+4)=124 ... | |
| Explain Solution | 2/13/2006 |
| Q: 10 times some number is 3 times the same number by 14. Solution 14 divided by (10-3) = 14/7 = 2 ... A: Something is missing from "10 times some number is 3 times the same number ^^^ by 14" I think it ... | |
| Percent Problem | 2/9/2006 |
| Q: A man sold two bikes for $3400 each. On one he made a profit of5% and on the other he made a loss of ... A: Let us assign a variable for each unknown quantity. We can use "x" and "y" to denote the sales price ... | |
| Inclusive & Exclusive Outcomes | 2/3/2006 |
| Q: When subracting 131940 - 131802 = 138 But, when a true or manual count from 131802 thru 131940 is ... A: Yes Monie, you are pretty much spot on. When we perform subtraction, this is an "exclusive" ... | |
| Ratios | 2/2/2006 |
| Q: Can you tell me how to find the ratio of any number ? I,m sure theres a formula but I don,t know it ... A: The ratio between two numbers (say, "A" and "B") is given by A:B (the quantity "A" divided by the ... | |
| speed, distance and time | 1/31/2006 |
| Q: My friend likes to travel everywhere at 60 miles per hour because he knows that he is travelling at ... A: I have been trying to send my reply over the past two days, but was unsuccessful. The system must ... | |
| conceptual math | 1/11/2006 |
| Q: Can you tell me exactly what conceptual math is? Do you think it is a good strategy to use for elem ... A: Cori, I think this emphasizes more a conceptual understanding of mathematics, and less on the ... | |
| Puzzling Question | 1/11/2006 |
| Q: It's been a long time since I had algebra. Do you know what the following indicates? Find an ... A: I did not complete the question, because I want to give you the opportunity to work it out yourself. ... | |
| i neeed help on angles | 1/10/2006 |
| Q: plz help me i am the dumbest at maths plz help me there is a angle which make a cross the left side ... A: I cannot comprehend this diagram based on the information you have given. But I guess it looks ... | |
| Puzzling Question | 1/10/2006 |
| Q: Here is mySarah's age is 2/3 of Mary's and 3/4 of Ruth's. The sum of their ages is 46 years. How old ... A: Translating the information into algebraic expressions is probably the best way of tackling this ... | |
| permutation | 1/5/2006 |
| Q: please sir can you group numbers from 1 to 50 in groups of fives with all making an appearance in ... A: I do not fully understand your question. What conditions, if any, are placed on the group ... | |
| inequalities | 1/4/2006 |
| Q: Why does the inequality sign need to be reversed when both sides are divided by a negative number? A: Kellie, To make sense of this, just plug in some numbers. Consider 1-x>5, ...[#0] -x>4 ...[#1] ... | |
| exponets | 1/3/2006 |
| Q: my math Q is 1 over 3(e^-3)^4 i am not good in math and dont know what to do we the "e". A: The "e" is a "constant", with an approximate value of 2.7172. To simplify this expression, you need ... | |
| Why is (-)*(-)=+? | 1/3/2006 |
| Q: My son is in 5th grade. He asked me a very basic question why is (-3)*(-3)=+9. I know this is a rule ... A: An excellent question from your son. Negative numbers were in fact not used by some ancient ... | |
| Average of 7% & 2% | 12/18/2005 |
| Q: I want to thank you for the reply. 1. Is this a weighted average if the principles are equal? The ... A: 1. Weighted average is a more general concept. The average you are used to seeing is a specific ... | |
| systems of equations | 12/13/2005 |
| Q: 3p - q =10 2p - q =7 I know the answer. p=3 and q= -1 My question is: Is graphing the only way to ... A: Good question. Graphing is only an ad-hoc method for solving systems of equation. It is often first ... | |
| analytical geometry | 12/13/2005 |
| Q: what is this equation called x*y=constant ? A: This equation depicts a hyperbola. Let "k" be an arbitrary "non-zero" constant. Rearranging this, ... | |
| Average of 7% & 2% | 12/12/2005 |
| Q: If $30,000 is invested at simple annual interest as $20,000 earning 5% and $10,000 earning 2%, the ... A: You should consider the "weighted" average instead, because the principles are unequal. i.e., you ... | |
| equations | 12/11/2005 |
| Q: 3(4x-3)+16=7x+17 A: Sorry about the delay. I didn't realize that questions got through on the Dec 11, when I was ... | |
| Algerbra Problems | 12/9/2005 |
| Q: I am haveing a lot of trouble with my algerbra could you please help me? What I don't get is ... A: The type of problem you have described is called "inequalities". An "inequality" is an expression ... | |
| Fractional Parts Equaling One | 12/7/2005 |
| Q: How can the unknown amounts be determined for the following calculation? (What fractional part of ... A: I don't think it matters whether we are dealing with fractions or not. We can let "x" and "y" be the ... | |
| Homework | 10/19/2005 |
| Q: Help! Could you explain to me what "Term to term" and "Position to term" mean? I would be really ... A: I don't have sufficient information to deduce its meaning. This is not common maths jargon. Its ... | |
| Tax Rate (Mills) | 10/18/2005 |
| Q: I want to thank you for your reply; however, I am confused. If 1000 mills equals $1.00, how can 10 ... A: Let's be clear about this. You have been given a "tax rate", so you have to hand over $x for every ... | |
| Algebra | 10/17/2005 |
| Q: I need help answering some of my daughter's math problems... please phrase the answers so I can help ... A: The use of brackets is really important, as it can change the mathematical syntax completely. Your ... | |
| Tax Rate (Mills) | 10/17/2005 |
| Q: I want to thank you for the reply. However, I am not certain how to interpret the information ... A: Part 1: The interpretation is that 10 mills is equivalent to taxing $10 per $1000. Accordingly, a ... | |
| area | 10/11/2005 |
| Q: How many litres of water would be in a tank that was 10,000m2 with 80cm depth? A: To answer this question, we need to understand the relationship between density and fluid volume. ... | |
| Equations | 10/10/2005 |
| Q: I want to thank you for the reply. In your answer you indicated the following: "This is a ... A: A few of these include, i) associativity under addition; ii) associativity under multiplication; ... | |
| function | 10/6/2005 |
| Q: some friend are taking a long trip, on route 66 from Flagstaff, AZ through new mexico and texas into ... A: Tatiane, When working with word problems, learn to ignore information which are irrelevant. For ... | |
| Equations | 10/5/2005 |
| Q: I want to thank you for the reply and answer, but I am somewhat confused. If I solve the equation as ... A: Good question. It's important to clear this up. This point is this, solving 1152y = 1152y, is no ... | |
| T chart 5th grade level | 10/5/2005 |
| Q: My son has brought a chart home about perimeter, it is broken into 3 columns first column shape #, ... A: This is what I think, let me try to explain this with the symbol "L". Can you pretend that "L" is ... | |
| Equations | 10/4/2005 |
| Q: What is the answer for this equation: y/3 * 6 = 4y/8 * 4? If y/3, 6, 4y/8, and 4 are multiplied by ... A: All values of "y" in the field of real numbers will satisfy this equation. Actually, I prefer to ... | |
| Proportions in the Right Triangle | 10/3/2005 |
| Q: I received a question on my test and I did not know how to approach the question. My teacher would ... A: No problem. Let's draw a diagram so that we are both on the same page. A | | | |------D | | | ... | |
| Percentages | 10/3/2005 |
| Q: I want to thank you for the reply. Calculation (b) is an easy one to determine a situation to use. ... A: Part of the problem with (a) is the automatic association between 3 and 300%. In certain situations, ... | |
| Percentages | 9/28/2005 |
| Q: When is calculation (a) used and when is calculation (b) used in a common consumer buying situation? ... A: The question is too open-ended. A number by itself could mean a million different things. I just ... | |
| ???????7th grade math????????? | 9/27/2005 |
| Q: I am 49 years old and am trying my best to help a 13 year old boy who is staying with us to do his ... A: Allow me to quickly recap the definitions of these terms. Given a data set (or observations) X, ... | |
| solving for x | 9/27/2005 |
| Q: Every time I do this problem I come up with 11/9. My answer book tells me I should be getting 11/3. ... A: Solving x/2 - (3+x)/4 = 1/6 is equivalent to solving 6x/12 - 3(3+x)/12 = 2/12 ...all i've done is ... | |
| Percentages | 9/22/2005 |
| Q: How is a complex decimal like 0.3(1/3) converted to a percentage? For example, 0.33 is 33/100 = ... A: Depending on what you are more comfortable with, I suggest that you work only with decimal numbers ... | |
| Algebra | 9/22/2005 |
| Q: x=3+1/2x What is x? Thank You! A: Jessica, I have to guess a little as to what your question actually states. If the question asks ... | |
| geometry | 9/19/2005 |
| Q: draw any angle less than 90 degrees. how do I construct an angle with double the measure of the ... A: Let the angle be subtended by ABC. ............A . . . . angle X B....................C The ... | |
| geometry | 9/19/2005 |
| Q: AB is one arm of angle ABC and BD is the bisector of angle ABC. How do I construct the other arm of ... A: I don't have a unique solution to your problem. It depends on what the triangle ABC looks like. If ... | |
| ALGEBRA | 9/19/2005 |
| Q: (5 – 9)2 ÷ 8 • 3 + 5 HOW DO I GET THE ANSWER TO THIS? A: Here are the order of precedance for the four basic operations. 1 Parentheses (),[], etc. 2 ... | |
| Combinations and permutations by group; not individual | 8/29/2005 |
| Q: [Question] There are 5 people, 3 republicans and 2 democrats. There is a table that will seat 3 ... A: It's really good that you are showing your thoughts. I would approach the problem this way. Let R=3 ... | |
| Dependence/Independence | 8/29/2005 |
| Q: you're the only person I can find on here who covers this area); There are 3 people, Kate, Pam, ... A: This is not an issue...except I probably won't be around much of the time over the next three weeks, ... | |
| the discriminant | 8/1/2005 |
| Q: josh, the section i am working on is entitled "the discriminant and equations that can be written in ... A: The solution to the quadratic equation ax^2+bx+c=0 is given by x=[-b+sqrt(b^2-4ac)]/(2a) and ... | |
| exact roots | 7/27/2005 |
| Q: find the exact root of x^3+x-1=f(x) do not want the answer that the calculator gives- x=.6823278 A: You solve for u^3+su+t=0, where w = cube_root_of {-(t/2)±sqrt[(t^2/4)+(s^3/27)]} v = cube_root_of ... | |
| Probability followup | 7/26/2005 |
| Q: I see now! Thanks, but I thought they had all to be the same probability, how come they can be ... A: The probability for each event may or may not be the same. We have to be careful about making ... | |
| Probability followup | 7/25/2005 |
| Q: sorry about this but I've just been thinking about this and: ... A: Sorry about the notation. Let me clarify this. P("KPW") represents the probability of drawing the ... | |
| Probability (ignore the last one) | 7/20/2005 |
| Q: 1) Don't know if this'll help but this is what I did, it's not very good (hard to see): ... A: Now I see what you're trying to do. So, you have to draw the names three times. The names are drawn ... | |
| Daughters Word Problem | 7/20/2005 |
| Q: My 16 year old daughter is struggling with these types of problems on her summer school homework. If ... A: I will attempt to solve this problem using two methods. The first method uses Calculus. It is more ... | |
| Graphs and functions | 7/13/2005 |
| Q: I want to find a website about the simple rules and instructions in drawing graphs easily. Can you ... A: Nassim, I don't know any more than you do off the top of my head. Best way is to type in keywords ... | |
| Probability | 7/12/2005 |
| Q: Would you say this was okay?: (12x5)+(38+5)=250 12x=250p x=20.83p x <or equal to 20pHi:), I ... A: Yes. Please refer to my earlier reply (duplicated below). Let me correct what I said yesterday. ... | |
| Probability | 7/11/2005 |
| Q: ), I have this problemo (QUESTION B): http://img223.imageshack.us/img223/2692/hpim08420en.jpg Well ... A: Let me correct what I said yesterday. Since there are 12 wins from 50 games, we need to distribute ... | |
| Those darn Triangles | 7/5/2005 |
| Q: I truly admire my daughter's imagination, but I'm no help with her on this puzzle she created for ... A: I see there's a little bit of confusion. Let me say this to get it out of the way. "Square meters" ... | |
| Finding Times | 6/27/2005 |
| Q: I have this problem: "A boy watches TV for 24 hours a week. On friday saturday and sunday he ... A: For problems like this, let the unknown quantity be "x". Here, x represents the number of hours ... | |
| terms for letters in equations | 6/23/2005 |
| Q: What is the official term for the letters used in equations? i.e. when you say Y means ... - is it ... A: Clarissa, In the context of a mathematical equation, e.g., x^2+2x+1=0, the unknown quantity, "x", ... | |
| Writing an equation | 6/22/2005 |
| Q: Option 1: Equipment can be purchased for one-time cost of $25,000. Option 2: Equipment can be ... A: Alex, The first option is indepedent of x. Doesn't matter how many months it last for, you pay for ... | |
| math | 6/13/2005 |
| Q: whic one of the following is a composite number? A: 13 B: 63 C: 61 D: 31 WHAT ARE THE PRIME ... A: A composite number can be written as a product of two or more integers. The answer to the first ... | |
| asymptotes | 6/2/2005 |
| Q: The graph of y=x/(1-absolute value(x)) has A. no horizontal asymptotes and one vertical asymptote ... A: Haven't heard from you for a while. It is usually helpful considering all possible x values which ... | |
| algebra word problem | 5/26/2005 |
| Q: a sailboat is 3 hours on the water before it reduces its average speed by 5 mph. It travels 57 miles ... A: Let the unknown quantity be x. Here, x represents the speed of the sailboat in the first three hours ... | |
| tree diagram/ permutation | 5/23/2005 |
| Q: How many ways can you choose 3 CDs from a group of 5? A: The answer depends on whether the order of appearance makes any difference. Since your question is ... | |
| ma | 5/17/2005 |
| Q: if u multiply their ages by mine the product is 2450, if u add their ages together the result would ... A: I am slightly confused by the pronouns. When you mention "they", how many people are we talking ... | |
| math | 5/12/2005 |
| Q: "I'm thinking of a 6-digit number. The sum of the digits is 43. And only two of the following three ... A: Suppose the 6-digit number is written "abcdef" as a character string. This is a literal ... | |
| algebra | 5/11/2005 |
| Q: show me the work..please 1.At a certain high school, the respective weights for the following ... A: You must know something. You need to show me the working next time and say where you're stuck. This ... | |
| math | 5/11/2005 |
| Q: 5 1/8+ 3 3/8-7 2/3= A: Convert mixed fractions into improper fractions, then, collect the terms in the numerator. 5 and ... | |
| equivalent deciamals for fractions | 5/10/2005 |
| Q: the directions of her homework are to write the equivalent decimal for the fraction. for exapmple ... A: 18/25 is the same as eighteen lots of "one twenty-fifth". 18/25=18*(1/25)...[#1] Now, 1/25 is ... | |
| Please help! | 5/5/2005 |
| Q: How are a centimeter, a ilogram and a milliliter the same? How are they diffrent? Explain. I am ... A: I'm kind of with you on this one. This question is badly phrased. The only thing in common that I ... | |
| Maths problem | 4/25/2005 |
| Q: I wondered if you could help us with this maths problem as the whole family are arguing about the ... A: Let's say that both cars (x1 and X2) start at point E. x1 faces point B. x2 faces point H. The route ... | |
| Range | 4/12/2005 |
| Q: what does range mean?...like in something like this (2,1) i know the domain is the 2 but what is ... A: (2,1) represents one coordinate in the X-Y plane. We identify x=2 as the abscissa (also called, ... | |
| what about the last question... | 4/7/2005 |
| Q: what about the last question you did not explain it --if a single letter is drawn from the set ... A: there are 5 vowels and 21 consonants. (i) prob = 21/26 (ii) not really sure what you mean, but ... | |
| if a single letter is drawn... | 4/6/2005 |
| Q: if a single letter is drawn from the set m,a,t,h what is the probability that the letter drawn is a ... A: if we pick a letter form the set A={m,a,t,h}, then, it is with 100% certainty that we have picked a ... | |
| systems of equations | 3/29/2005 |
| Q: solve each system of equation using either elimination, or substiution. 4a - b = 26 8a -b = 54 3s ... A: Christy, it's important that you understand the ideas behind this. Given two equations and two ... | |
| Pattern recognition | 3/28/2005 |
| Q: Please help with the next probable number for each group. 0,5,5,10,15 4,7,12,20,32,49 7,2,-1, -2, ... A: (i)It looks like you have made a typo in "0,5,5,10,15" I think this is an arithmetic sequence. Each ... | |
| Word Problem | 3/22/2005 |
| Q: I have never been very good at doing word problems, can you please help me? The time it takes to ... A: The "time" (t) taken to cover a "distance" (D) is "inversely proportional to the speed" (s). What ... | |
| related to a deck of cards | 3/17/2005 |
| Q: we deal randomlu 5 cards from a deck of 52. two deals differing only by the order are considered the ... A: You start with a deck of 52 cards. Pick one in random and give it to person A. Now, you are left ... | |
| worded problem, please help, urgent | 3/17/2005 |
| Q: in a group of 120 movie critics, 70 do not like Fellini, 90 like Tarkovsky, and 21 do not like both. ... A: Best to draw a Venn diagram to see these things. But i can't draw here. Facts: Total no. of ... | |
| ratio | 3/16/2005 |
| Q: Table 1: Manpower statistics in Advertising agencies ... A: To obtain the ratio, for each job description, divide the number of male employees by the number of ... | |
| Math | 3/14/2005 |
| Q: Values Plus has a jacket on sale for $58. This is $5 less than half of the price of the same jacket ... A: Kelly. Please show me your working next time you send me a question. I want to see that you have ... | |
| math | 3/10/2005 |
| Q: What is the equivalent to 17.5mm? A.) 0.175 cm B.) 1.75 cm C.) 175 cm D.)1,750 cm A: The word "milli" in millimeter tells us that we should divide things by 1000 relative to the unit in ... | |
| math | 3/9/2005 |
| Q: I was doing these binominal probabability distribution questions and i'm stuck on a few of them. ... A: I just don't have the time to go through all these. Refer to my other reply to understand the basic ... | |
| math | 3/9/2005 |
| Q: a sales person has to sell a minimum of 50 cars in a month in order to get a bonus . one particular ... A: Sue, Such probability calculations are computed using binomial expansion. To reach the quota of 50, ... | |
| funtions | 3/8/2005 |
| Q: Find functons of f and g so that f o g = H. H (x) = 2 abs(x-3) + 1 I really dont know how to do ... A: Re: Composition of functions. Suppose that f(x) defines a function, which accepts x as its input ... | |
| determining possible real roots | 3/7/2005 |
| Q: HOw many possible real roots are there for x^5 - 4x^4 + 3x^3 - 2x + 2. My teacher said that there ... A: This is a consequence of the fundamental theorem of algebra (F.T.O.A). It states that given a ... | |
| Distance Question | 3/6/2005 |
| Q: Matt is going to a baseball game. If he goes 75 miles per hour, he gets there an hour before the ... A: Nikki, The first rule for translating a word problem into a maths problem is to assign a name to ... | |
| Math percent alger. | 3/2/2005 |
| Q: 32 treatments a day can be performed each treatemnt gets performed on a person 60% of our people get ... A: Each treatment received by each person occupies one of thirty two time slots. If a person receives 2 ... | |
| Inverting Complex Fractions | 2/28/2005 |
| Q: I thank you for your reply. However my question was not exactly answered. Is it possible for a ... A: I think the answer is a matter of perspective. To some people, flipping the fraction does not even ... | |
| sum of rhombus perimeters | 2/27/2005 |
| Q: The side of a large rhombus is 3. If rhombi are continually drawn within each other, with each ... A: Okay, a rhombus has four sides and all sides are equal in length. So, the largest one has a ... | |
| algebra | 2/23/2005 |
| Q: having problems with factoring out equations 1)factor trimonial 3m^2 + 12m^2 +9m 2) factor trimonial ... A: 1) The common factor should be quite obvious. all three terms contain 3m. So, take this out the ... | |
| trigonometric functions | 2/23/2005 |
| Q: If tan0=radical11/5 and secant0>0, find a)sec0 b)cos0 c)sin0 d)csc0 e)cot0 A: Understand this. All these fancy terms used in trigonometry are simply the ratios between the ... | |
| factors | 2/21/2005 |
| Q: what is the smallest whole number which is exactly divisable by all the numbers from 1 to 10 ... A: Write down all the prime numbers in the range from 1 to 10. They are include P={2,3,5,7}. At the ... | |
| factoring | 2/21/2005 |
| Q: How would you factor: x^3+x^2+x-3. So how would you factor something like that. (I know the answer ... A: No worries Jeff. You are welcome. Good to hear that you are doing so well. For this type of cubic ... | |
| algebra | 2/16/2005 |
| Q: I'm trying to solve these followign problems for a week, but I can't figure it out. 1. A balloon, ... A: Gina, Take note of the methods used. 1. As always, assign a variable for the unknown quantities. ... | |
| From Pounds To Ounces | 2/15/2005 |
| Q: I want to thank you for the reply. However, I am still somewhat confused by your reply. Can you ... A: Remember that a fraction is simply an expression of a ratio. When I said number three is equivalent ... | |
| From Pounds To Ounces | 2/14/2005 |
| Q: 1/4 pounds = ? ounces Solution: 1/4 pounds divided by 1 pound/16 ounces = 1/4 pounds X 16 ounces/1 ... A: The calculation is equivalent to finding X in the expression (1/4)[lb]/X[ounce]= 1 [lb]/16[ounce] ... | |
| Fibonacci Numbers | 2/13/2005 |
| Q: I want to thank you for the reply. I noticed that you started with the second number "1" from the ... A: It doesn't matter what the index of the first term is. You can begin with i=1 instead of i=0 if you ... | |
| Fibonacci Numbers | 2/10/2005 |
| Q: Can you explain how the percentages of 62 and 38 are determined from the following? "The Fibonacci ... A: The ratio is actually 62% or round about. If we let T[n] be the nth term in the Fibonacci sequence ... | |
| algebra 1 | 2/9/2005 |
| Q: 3/x-2=1/x-1 - 7/(x-1)(x-2) trying to help my son with a college course, it has been too long since i ... A: The key to this problem is writing everything over a common denominator. We have ... | |
| percentage | 2/8/2005 |
| Q: I have a math standard's test and I need to learn about percentage.What is 0.07 in percent? A: Aaron, To go from a decimal (such as 0.07) to percentage, just remember to multiply the decimal ... | |
| hard polynomials | 2/8/2005 |
| Q: (x^3-1)/(x-1) I know the answer is x^2 +x +1,however I don't understand how to get that. One reason ... A: I guess polynomial division is probably a good starting point for understanding this problem. Let me ... | |
| When you are figuring monthly... | 2/2/2005 |
| Q: When you are figuring monthly interest calculations, paying interest only on a loan, how do you ... A: The answer is $152.01. The formula is M=(P*r*(1+r)^N)/((1+r)^N-1), where P is the principal, r ... | |
| algebra | 1/28/2005 |
| Q: 1. Can every line be written in slope-intercept form? Explain. 2. Does every line have two distinct ... A: Gina, You really should attempt the problem set or at least have a go at answering the questions ... | |
| mathmatical term | 1/28/2005 |
| Q: What is empty set? I have looked up resources for definition but could not quite coprehend their ... A: Put simply, an empty set is a set which contains no element. It is usually represented with the ... | |
| a problem | 1/26/2005 |
| Q: Problem: The width of a rectangular playground is 75 percent of the length. If the perimeter of the ... A: Kristi, Here is the general guideline on how to formulate and solve a mathematical problem. 1. ... | |
| No smaller than 20 | 1/26/2005 |
| Q: I have a quick question for you. When question says, "no smaller than 20", does it exclude 20 ... A: Precisely. "no smaller than 20" excludes 20. Mathematically, we can express this in two ways. Either ... | |
| prime factor | 1/24/2005 |
| Q: Questions: 1. What is prime factor? 2. How do I figure out the greatest prime factors of 15, 14 ... A: (1) A factor is an integer which divides a larger integer, leaving us with no remainder. So, ... | |
| exponet | 1/24/2005 |
| Q: this question ia about the rules of exponents. What is the difference between: 3X^2 and (3X)2 ... A: The first one reads "three times x square". You multiply (x^2) by a scalar value, which is 3 here. ... | |
| Greatest Common Factors & Least Common Multiples | 1/16/2005 |
| Q: What method or methods (calculations) would you recommend using for determining the greatest common ... A: For smaller numbers, intuition works best. For instance, the factors for 48 are kind of obvious, by ... | |
| Compound Interest Rate | 1/10/2005 |
| Q: I am making a recurring deposit of USD 10,000 every year for 40 years. The maturity amount after 40 ... A: My derivation leads to the following formula, ... | |
| Sets | 1/10/2005 |
| Q: U is the universal set and A and B are two subsets of U. #U=u, #A=a, #B=b, #(A n B)=x, #[(A u ... A: The cardinality of NOT(UNION(A,B)) is equal to #U-(#A+#B)+ #INTERSECTION(A,B). So, #[(A u B)'] = ... | |
| verbal problems | 1/9/2005 |
| Q: The profit a coat manufacturer makes each day is modeled by the equation P(x)=-x^2+120x-2000, where ... A: Okay. The thing to appreciate is that any equation containing two variables, with one depending on ... | |
| name the coordinates of the vertex, the equation of the axis of symmetry, the direction of the opening, and the shape of each parabola. | 1/8/2005 |
| Q: y=xsquared-12x+20 A: I am very sorry for the lateness of this reply. I thought I had entered the right date in the ... | |
| percentage | 1/6/2005 |
| Q: I would like to know how do i get a percent of something from a calculator. What are the steps that ... A: I am very sorry for this late reply. I thought I entered the right date for my vacation in the ... | |
| square roots | 1/4/2005 |
| Q: I cannot remember how to do the arithmetic to find the sq root of a number, e.g. I know the sq root ... A: I am very sorry for this late reply. I thought I had entered the right date for my vacation on the ... | |
| quadratics | 12/14/2004 |
| Q: how do i solve 3x squared=6x-1 using the quadratic formula? A: Remember this. You can always rearrange a quadratic equation and express it in the standard form, ... | |
| FRACTIONS | 12/13/2004 |
| Q: 5/6,5/8,3/5,1/10,2/7,3/12 is equivalent to what fractions, I am a 4th grader? A: Let's consider an example. 50/50 is equivalent to 10/10. If you take a quiz and answered 50 ... | |
| circles | 12/8/2004 |
| Q: A regular hexagon is inscribed in a circle. What is the ratio of the length of a side of the hexagon ... A: Your reasoning for the length of the minor arc is correct. I think it helps if we derive things in ... | |
| factoring | 12/8/2004 |
| Q: I am tring to factor (u-v)^3 + v-u. I keep getting the same wrong answer. A: Firstly, observe that u-v = -(v-u). This enables us to write the first term in terms of (v-u). ... | |
| what is 1lb in metric measures? | 12/7/2004 |
| Q: I know 14lb is equal to 6.35 kg. Will you take me through the steps to find out what 1lb will be in ... A: From this information, mathematically, we can write X [pounds] = Y [kilograms]. Dividing both sides ... | |
| Probability | 12/1/2004 |
| Q: I went through the problem on my own again and got the same answer as you did. I was just wondering ... A: I tried to reply to your question last Friday, but the web server has rejected my submissions on ... | |
| Math confusion... | 11/29/2004 |
| Q: Howdy! Back when I was in school, we were taught to perform mathematic operations in the MDAS ... A: Yes, indeed. Multiplication and division are given the same precedance over addition and ... | |
| Prop Calculus | 11/29/2004 |
| Q: ..Jst seen your ad' do you know how to do algebraic laws? A: Do you mean the 12 number axioms? Since you didn't mention any aspect that you don't understand in ... | |
| math | 11/24/2004 |
| Q: express as a percentage 801 ---- = 900 A: There is very little to do. If you are allowed to use a calculator, just divide 801 by 900, then ... | |
| math | 11/24/2004 |
| Q: what is 40% of $264 = A: Everytime you are given a percentage figure, you need to convert it to a decimal figure before you ... | |
| math | 11/18/2004 |
| Q: what is 10 5/8 of 96 = A: Do you mean 10 and 5/8 percent of 96? Well, 1/8=0.125. So, 5/8 = 5x(1/8) = 5x0.125 = 0.625. 10 5/8 ... | |
| math | 11/17/2004 |
| Q: I have been working on this paper i have and i cant find the answeres to these questions please ... A: Let's understand the definitions. [1.0] Relative Error is defined as the actual error as a ... | |
| step function | 11/16/2004 |
| Q: thanx for ur reply but i would really appreciate if u can refer me to some site that has some detail ... A: I don't know any good site off the top of my head. Try typing "dirac delta" and "example" in your ... | |
| step function | 11/15/2004 |
| Q: Can u just explain to me in simple words and terms that what is a dirac delta function and step ... A: 1. A dirac delta function delta(x) has zero value everywhere, except that it has an impulse with one ... | |
| find all real solutions to the equation | 11/15/2004 |
| Q: (x-3)-1/3=1/5 A: The way the question reads, it contains no superscript whatsoever. So, the general idea is to ... | |
| Chess board stats. | 11/10/2004 |
| Q: Josh, If I have a grid 4 squares by 8 squares and 12 identical counters how many possible ... A: Under these conditions, there are C(32,12) combinations. Where C(N,m)=N!/[(N-m)!*m!] and the ... | |
| i have an isosceles triangle... | 11/9/2004 |
| Q: i have an isosceles triangle and have all the lenths, how do i find the angles? A: Let's draw a diagram. A | | | D--------C | | | B An isosceles triangle is formed by joining ABC. ... | |
| trig | 11/7/2004 |
| Q: Can you please explain this part:Expanding the left hand side of the original expression, ... A: Please refer to http://www.geocities.com/joshcameron_ae/Archive/Trigonometry.pdf for further ... | |
| Help with college algebra (intermediate) | 11/4/2004 |
| Q: You sound like you can help me. I hate work problems, they throw me off really bad. Can you help me ... A: Let C denote the temperature in degrees celsius, where F is measured in Farenheit. C and F are ... | |
| trig | 11/3/2004 |
| Q: The expression(sinx+cosx)^2-1 is equivalent to sin 2x.Why? A: I can kind of understand where you are coming from. Mathematicians have been ridiculed since the ... | |
| math | 11/3/2004 |
| Q: My friend showed me a pair of 2 digit numbers where their product stays the same even when the order ... A: Recently, I had a similar question from Joe. Rather than relying on our intuition and picking ... | |
| deductive reasoning | 10/26/2004 |
| Q: abcd * 4 = dcba (all are different numbers) ... A: Here is what I propose. Before I answer this question, I think we should look at the metric system ... | |
| MATH CONVERSION | 10/18/2004 |
| Q: I AM AN ADULT, THIS IS NOT A SCHOOL PRODJECT. I JUST DO NOT KNOW CONVERSIONS. A: THE ANSWER: 110 centimeters is approximately equal to 43.3 inches or 3 feet 7.3 inches in length. ... | |
| types of variation | 10/4/2004 |
| Q: Given that y varies inversely as x and x varies directly as z.If z is doubled then y is halved.Why ... A: Please bear with me, as I am going to give quite a lengthy description to get you to see what is ... | |
| quadratic modeling | 10/4/2004 |
| Q: A certain quadratic function has the form f(x)+ ax^2 + bx + c, where a, b, and c not equal to ... A: Let's see...To find the unknown coefficients in the quadratic function, we need to find "a","b" and ... | |
| odometer in a car | 9/24/2004 |
| Q: How much does an odometer mark when a car is driven for one mile? A: I'm not sure what you mean by "mark". But the following article on gear ratio may answer your ... | |
| absolute value | 9/23/2004 |
| Q: I have a question about how to solve this problem: The absolute value of 5/9y-2/3 = -4 |5/9y-2/3| ... A: For expressions like this, there are two cases to consider. Here are the rules. If the quantity "a" ... | |
| work problem | 9/20/2004 |
| Q: Jan writes the program in 10 daya. Bob writes it in 8 days. WIth ted's help, the three can do it ... A: What the question is getting at is the work rate. The concept of work (W), work rate (R) and time ... | |
| math | 9/16/2004 |
| Q: Twenty-nine of the first forty-two presidents of the united states were lawyers. What percentage of ... A: Lance, It's okay to have a go if you're not sure of something. That's how we all learn -- through ... | |
| Math | 9/15/2004 |
| Q: This is the math problem of the week that my son (7th grade) recieved. I am having a hard time ... A: Well, I actually live outside America, so I'm not familiar with your monetary system. In fact, 1 and ... | |
| Quadratic Equations | 9/14/2004 |
| Q: I need to formulate three word problems that can be translated into quadratic equations ... ugh! Can ... A: The possibilties are endless. First of all, understand that a quadratic equation has the form, ... | |
| adding and subtracting decimals | 9/13/2004 |
| Q: how do I Identify each property shown? (8.7 + 6.3) + 3.7 = 8.7 + (6.3 + 3.7) Thanks It Would ... A: This property is called the "associative law of addition". In plain terms, it means, that if we have ... | |
| math | 9/8/2004 |
| Q: simplify 8 ------- 1/5 + 3/10 = A: OK. In the previous question, I have given you directions on how to handle such a question. Now, ... | |
| math | 9/8/2004 |
| Q: simlify 2 1/2 3 3/4 = A: You have mistyped the equation. It contains no mathematical operators (such as +,-,*,/). In any ... | |
| tables and charts | 9/7/2004 |
| Q: I know this may seem like a simple question, but what is the difference between a table and a chart? ... A: Your question reminds me of a presentation that I attended some months ago, in which, the executive ... | |
| algebra | 9/6/2004 |
| Q: Okay, here is the problem I'm stuck on from my book: Shrinkage in concrete beams. As concrete ... A: Why don't we draw a diagram to understand what's going on. You begin with a beam like this, ... | |
| Algebra extra credit question(i need the extra points) | 9/2/2004 |
| Q: You have two quarters, three dimes and four nickels in your pocket . You reach into your pocket and ... A: Here is a summary of each coin's worth. The Penny is equivalent to 1¢ or $0.01. (One hundred ... | |
| math | 9/1/2004 |
| Q: find the value of 3/13 x 26/27 x 9/2= A: This is the same as multiplying 3,26,9 in the numerator and multiplying 13,27 and 2 in the ... | |
| math | 9/1/2004 |
| Q: if it takes 2 1/3 hours to complete a certain job how many hours would it take to complete 12 jobs A: The work rate is 2 1/3 hours per job. Writing this as an improper fraction, two and one third is ... | |
| sequence | 8/23/2004 |
| Q: I have one question for you, kindly help me. 1. The infinite sum 1 + 1/5 + 4/5^2 + 9/5^3 + 16/5^4 ... A: Abir, The infinite sum 1 + 1/5 + 4/5^2 + 9/5^3 + 16/5^4 ......can be written as 1 + SUM_i ... | |
| probability | 7/26/2004 |
| Q: your videotape collection contains 5 history, 6 science fiction and 3 adventure movies. If you pick ... A: Assume you pick this at random. Chance of picking 2 adventure movies is 3 out of (5+6+3). So, any ... | |
| math | 7/20/2004 |
| Q: subtract 7 pounds 3 ounces from 10 pounds A: Please refer to "http://www.factmonster.com/ipka/A0001660.html" for all unit conversion problems. 1 ... | |
| math | 7/20/2004 |
| Q: Name the quadrant in which angle A must lie if secA>0 and cscA<0. My book explains the answer and ... A: Ab, As I've explained yesterday, there are only two fundamental definitions that you need to ... | |
| math | 7/19/2004 |
| Q: The origin of a coordinate grid is labeled O. Line segment OP forms an angle of 30 degrees with the ... A: Let's get back to basic definitions. Actually, before we do that, what is trigonometry for? ... | |
| Calculation regarding random chance selection | 7/19/2004 |
| Q: My question is a pretty simple one for math-competent people, which I am not. My question is this: ... A: Central to the following discussion is the assumption that each guess is statistically uncorrelated ... | |
| math | 7/18/2004 |
| Q: I asked the following question to a different expert and he didn't explain it good.I don't know the ... A: Okay, let's start from the ground truth. The circumference of a circle measures 2*pi*r. Here, "r" ... | |
| math | 7/18/2004 |
| Q: If a problem gives you a graph(with a logarithm function) and asks which equation(from the multiple ... A: By definition, a log function is the inverse of an exponential function. A base n logarithmic ... | |
| math | 7/14/2004 |
| Q: A rod pivoted at 1 end is 6 inches long. If the free end rotates in a machine at the rate of 160 ... A: Ab, To become good at solving problems, you need to figure out - what you do know from the ... | |
| math | 7/14/2004 |
| Q: Depreciation of a car is determined by the formula, V=C(1-r)^t, where v is the value of the car, c ... A: When we know the original cost (C), the current value (V) and the time period (t), the equation ... | |
| math | 7/13/2004 |
| Q: Is y=-3^x a exponential function? The reason I say it might, is:the equation for an exponential ... A: Ab, To answer your question, we have to pay respect to the associative law in mathematics. I ... | |
| math | 7/12/2004 |
| Q: at a party each person is to be served 1/4 of a pizzahow many people can be served from 8 pizzas A: Linda, We can re-phrase the wording to translate this information into a mathematic equation (or ... | |
| math | 7/1/2004 |
| Q: how long is 2/5 of 15/16 inch A: Learn what the question is asking. We need to find 2/5 of X, where X=15/16. What do we do? We ... | |
| math | 7/1/2004 |
| Q: what is 3/4 of 4/9 kilogram A: Linda, Fractions tell us the proportions. To find three-quarters of X, we multiply X by (3/4). Here ... | |
| Fractions | 6/28/2004 |
| Q: The coopers have an orange juicer that they use to make fresh squeezed oj. The first squeezing the ... A: What this question amounts to is a telescopic series. Let a(n) be the amount of juice in the orange ... | |
| Trigonometry question | 6/28/2004 |
| Q: it took me an hour or so to work through that, but you explained it well and I can see its ... A: Yeah, I agree. For a 3 mark question, your teacher can't expect you to suddenly become an inspired ... | |
| math | 6/24/2004 |
| Q: how much larger than 3/4 inch is 25/32 inch? A: These questions are all based on the same principle. This question asks for the difference between ... | |
| math | 6/24/2004 |
| Q: add 1/2 liter 3/4 liter and 7/8 liter thankyou A: Linda, Forget about the numbers, just think for a moment, what you need to do to tackle this type ... | |
| Trigonometry question | 6/22/2004 |
| Q: this question doesn't bear much importance anymore but it's really getting on my nerves. On my ... A: I know how you're feeling. It's always good clearing things up. With trigonometry, there are ... | |
| Stats | 6/21/2004 |
| Q: When answering a multichoice question on a test. If the previous 5 answers were A's is it correct ... A: The answer is as follows. It depends on whether the questions are correlated or not. If the choices ... | |
| alegbra | 6/14/2004 |
| Q: 1) when administering a standard intelliegence test, we expect about 1/3 of the scores to be more ... A: Christysen Andall, Q1. Use variable X to represent the outcome of an intelligence test. Let P(X>=x) ... | |
| Math Question | 6/9/2004 |
| Q: Maybe you can help me. I was given a homework assignment dealing with divisibility, bases, and ... A: Hey Ashley, Let's talk about number representation in the metric system. (I) NUMBER REPRESENTATION ... | |
| simple math | 6/3/2004 |
| Q: basic Question - simple, general math...and I can't remember how to calculate the answer! This ... A: Bubbe, The unit cost is given in "dollars per pound", i.e., [$/lb], while the product is weighed in ... | |
| logs | 5/18/2004 |
| Q: Ln(x+1)-Ln(x+4)=4 A: Using the fact that -log(b)=log(1/b) and log(a)+log(c)=log(a*c), ... | |
| Algebra help | 5/12/2004 |
| Q: My 9th grader needs help with a problem, can you help? Solve the system. 2x + 5y = 7 4x - 3y = -25 ... A: Solving simultaneous equations ============================== 2x + 5y = 7 ...[Equation 1] 4x - 3y ... | |
| please help me!!!!!! | 5/11/2004 |
| Q: 1} 9+10p=49 2} 8r-29=-29 3} 14-n/4=17 4} -18=5-r/2 5} 250-w/7=240 6} -x/3.2+7=-8 7} 36=8-7y ... A: Heather, This set of problems are all based on the same principle. Isolate the variable (ie., the ... | |
| college algebra | 5/10/2004 |
| Q: I do not understand anything about logarithms. 1.) write as a single logarithm 8lnx-5lny ... A: Just as division is the inverse of multiplication, logarithm is the inverse of an exponential ... | |
| Algebra II (Polynomials) | 5/6/2004 |
| Q: i have a major test comming up that may decide if i graduate or not and i don't know how to do half ... A: Mandi, You cannot leave things till the last minute. If anything, preparation for the exam should ... | |
| alebra/word equations | 4/30/2004 |
| Q: perfectly insulated container contains 70 g of water at 40 oc. A small heater is immersed in the ... A: I really appreciate that you explained your difficulties. Okay, the specific heat tells us the ... | |
| Sequences & Series | 4/22/2004 |
| Q: How do i find the next term when i can not find a pattern? Such as 1/3, 1/4, 9/7, 16/9 A: This is neither an arithmetic nor geometric sequence, because it is neither monotonic increasing nor ... | |
| Rates | 4/21/2004 |
| Q: In the following calculation, the decimal, 0.05342, is known as a decimal rate. Why is the word ... A: "Decimal rate" is certainly not part of the maths vernacular. I personally would not use such a ... | |
| Make a table of values and graph each quadratic function | 4/20/2004 |
| Q: y=3x"2" and y=2.5x"2" A: x^2 simply means x multiplied by x. On your calc., just press [x] [*] [x]. Of course, x represents a ... | |
| Converting Units | 4/6/2004 |
| Q: I want to thank you for the reply; hoverver, I have a follow-up question. I have tried to decipher ... A: Numbers are meant to suggest the size of something. For example, 10 is ten times larger than 1. In ... | |
| Converting Units | 4/1/2004 |
| Q: Why is it necessary to change or to convert from different types of units to units that are the same ... A: Anonymous, For a given problem, the magnitude of each quantity in an expression must be measured ... | |
| Algebra 2 - Radicals | 4/1/2004 |
| Q: Could you tell me the answer : the square root of 14(the square root of 98 - the square root of 28) A: Your task is to simplify sqrt(14)*(sqrt(98)-sqrt(28)). Before we do this, let's revise on some of ... | |
| Monthly Payment Calculation | 3/31/2004 |
| Q: I have a follow-up question. Does $150.00/3 months equal $50.00/month? If so, this would most likely ... A: I can't answer that. The payment method depends on the prior agreement between the two parties ... | |
| Monthly Payment Calculation | 3/25/2004 |
| Q: Which one(s)of the following answers (1. 2., or 3.) could also be used as the answer to the ... A: I don't want to comment on its interpretation. This is not what mathematics is about. How the money ... | |
| Math Question | 3/24/2004 |
| Q: my question is: One thousand unit cubes are fastened together to form a large cube with edge length ... A: There are six sides to a volume. We can look at the cube, as though that it consists of 10 vertical ... | |
| algebra | 3/24/2004 |
| Q: Simplify ((a^2)/((a-b)^2)) - (b/(a-b))-(a/(b-a)) A: Okay, put everything over a common denominator. Observe the following: (a-b)^2=(a-b)(a-b) Let ... | |
| Word Problem | 3/23/2004 |
| Q: Why do you believe it is a bad idea to mix units with equal signs? From your last answer you ... A: Numbers are fundamental to mathematical operations, while units are not. By units, I don't mean ... | |
| Specific Variables?????? | 3/23/2004 |
| Q: I have a problem that looks like this: 1/2[a+b(squared)]c = 3(a-c) Can you tell me how to solve this ... A: I am not clear about your question. Does it read 0.5*[a+b^2]*c=3(a-c)? If so, 0.5*a+0.5*b^2*c=3a-3c ... | |
| maths puzzle | 3/22/2004 |
| Q: four statues stand on rectangular blocks with square tops,all of different sizes.For each block,its ... A: First, set up this problem algebraically. Let h(i) represent the height of the ith block. Similarly, ... | |
| value | 3/22/2004 |
| Q: if a= -4(under root 3) than a2? ( read: a square) A: There are various ways of doing this using complex numbers. You can define i=sqrt(-1). In general, a ... | |
| Word Problem | 3/11/2004 |
| Q: A three-foot wide shelf is used to hold a set of notebooks. Each notebook has a 3/4 inch wide ... A: I really don't want to go down that path, but if you insist, here is what you could have written. 36 ... | |
| subtracting fractions | 3/10/2004 |
| Q: can you help to teach me to subtract a fraction on my homework, or just to refresh my memory of it, ... A: 5-(2/3)*(3/7) =5-(2*3)/(3*7) ...cancel out common factor, the 3 that is. =5-(2/7) ...then, put ... | |
| Trigonometry | 3/9/2004 |
| Q: I cannot solve a few questions from my Advance Maths Text-Book. Please help me by solving the ... A: Sorry, but I only have time to answer your first question. To keep the algebra neat, use the so ... | |
| word question | 3/2/2004 |
| Q: Mari made a model of a prism whose base has 9 sides. How many edges and how many faces did her model ... A: Well, you know what a prism looks like. It has a bottom and a top cover. Each of the side of the ... | |
| Trigonometry | 3/1/2004 |
| Q: I am trying to solve a problem from Trigonometry but I am unable to solve it. The problem is from my ... A: This question is not too difficult, we just need to take care with the algebra. It is more ... | |
| Math | 2/25/2004 |
| Q: Why can't negative numbers be prime or composite can i have some examples please? A: This is a philosophical question for the mathematicians, I think it is a matter of convention ... | |
| Trignometry | 2/25/2004 |
| Q: I understand that if the angle (theta)is very small sin(theta)can be written as (theta) and ... A: Since these are analytic functions, if you consider their Taylor series expansion, it should be ... | |
| volume | 2/24/2004 |
| Q: will a 12 pound bowling ball with a circumference of 27 inches float in water? Archimedes ... A: There are various ways of doing this. Why not just calculate the density of the bowling ball, which ... | |
| Solving Equations and Inequalities | 2/23/2004 |
| Q: Having trouble with these 3 problems - 1) 0.22y - 0.6 = 0.12y + 3 - 0.8y 2) 6(x-2) - 16 = 3 (2x ... A: The general idea is to separate the "knowns" from the "unknowns". Here, "y" is the unknown. ... | |
| percents | 2/19/2004 |
| Q: i have problems on percent. 1) the regular price of a pair of boots is $85. the store marks the ... A: Okay Amy, Let the regular price be R, R=85. With the 25% discount off R, the discounted sales ... | |
| algebra | 2/19/2004 |
| Q: h(x)=x/2-7 determine the ordered pairs that satisfy the equation if the domain is{20,30,45,60}for ... A: Not sure if "1+e=120" has anything to do with the question. You did not say what "e" represents. ... | |
| Division & Percents | 2/18/2004 |
| Q: Are there any situations that would require using the following calculations? (1) 4/5% (4 ... A: (1) If you were told that 5% of X is 4, then, you can deduce X. You need to calculate 4/0.05, this ... | |
| compound inequality word problem | 2/17/2004 |
| Q: Donna's new car gets 22 miles per gallon (mpg) in the city and 34 mpg on the highway. Write a ... A: Let the gas consumption rate in the city be Rc, where Rc= 22 miles/gallon. Let the gas consumption ... | |
| Solving a equation | 2/17/2004 |
| Q: 1-[(1-t)^(a-1)/a]=G, a>1,0<t<1,0<G<1. Find "a" from the above equation. A: Do you mean 1-[(1-t)^((a-1)/a)]=G ? 1-[(1-t)^((a-1)/a)]=G 1-G=[(1-t)^((a-1)/a)] ... | |
| algebra | 2/16/2004 |
| Q: helpppppp.please keep failin' 1.graph:2=x-y 2.graph the equation:2y+x=-3 A: Linda, The two equations both represent straight lines. To appreciate what they look like, first, ... | |
| MATHEMATICS | 2/16/2004 |
| Q: May I know which civilization first dicover “zero”? A: This question was asked previously. You should do your own research my friend. Have a look at the ... | |
| Compound Interest | 2/11/2004 |
| Q: I want to thank you for your reply. I do not understand the reason for using r=R/4% instead of ... A: I think you are analyzing things too much and it is holding you back. In small matters such as ... | |
| math | 2/11/2004 |
| Q: hmm. thanks a lot! is there any other simpler way to do this question ? i'm having a bit trouble ... A: Sue, You need to understand what dot products and cross products are for. Dot product returns a ... | |
| math | 2/10/2004 |
| Q: can you help me on one problem? how do you find the equation of the line that has teh following ... A: Let R be the rotation matrix. R=[cos(w) sin(w)] [-sin(w) cos(w)] It is unitary and has ... | |
| Compound Interest | 2/10/2004 |
| Q: Are the amounts of interest on $100.00 at 5% compounded quarterly for one year or compounded ... A: No, you cannot compare the two, since the time horizons are different. The problem amounts to ... | |
| Hi, I know how to solve this... | 2/3/2004 |
| Q: I know how to solve this problem but there is one thing I don't understand. Write the equation of ... A: The minor always refers to the distance between the extremities (vertices) of the ellipse on the ... | |
| Algebra | 1/27/2004 |
| Q: Solve by factoring. 1. 4x^2-15x=4 2. 12x^2-11x-15=0 3. 3x^2-48x=0 4. x^2=3x+10 A: Sandra, Rather than showing you how to do a couple of questions, you really need to learn the ... | |
| Fractions With Units | 1/27/2004 |
| Q: In the following calculation, 56 miles/60 minutes represents miles per minute: 56 miles/60 ... A: Answer: Part 1. Just a fraction or percentage. Nothing more. Answer: Part 2. (i) The problem would ... | |
| Algebra II | 1/6/2004 |
| Q: i'm having trouble with these type of problems: solve and graph the solution set for each open ... A: You need to remember two rules before we solve this problem. ... | |
| numbers | 12/16/2003 |
| Q: how many 3 digit numbers can you create with 3, 6, 7 and 9 using each digit only once in each ... A: How many digits "_,_,_,_" can we create? Number of ways to fill the first digit is 4, since we have ... | |
| exponential (but very dumb question) | 12/10/2003 |
| Q: Josh, If I graph, 1 2 4 8 16 24 48 96 192 ... then I thought this was an exponential curve... is ... A: It was a good question by the way:) The data suggests that this function grows at a rate which ... | |
| Rates | 12/8/2003 |
| Q: If the rate of 90 miles/45 minutes is separated as in 90 miles X 1/45 minutes, is 1/45 a fractional ... A: The answer is "1/(45 minutes) and the numerator, 1, has no units". A[miles] / B[minute] is ... | |
| Best math teaching method | 12/3/2003 |
| Q: I am a grandma homeschooler of a gifted child. he is 3 years old and he is doing second grade math. ... A: In my opinion, mathematics taught in south east asia countries are generally of a higher standard ... | |
| Algebra.. | 12/3/2003 |
| Q: Let f(x)=2x+3 and g(x)=x(to the power of 2). Write the function h(x)=4x(to the power of 2)+12x+8 as ... A: I think you made a typo. It's not possible to get 4x^2+12x+8 from function composition, given ... | |
| Trig Pointgs | 12/1/2003 |
| Q: I am really stuck on thisFor each of the points show what P(x), cos X, sin x, tan x cot x, sec x & ... A: The first thing I got to say to you is don't ever give up on something because you think you are ... | |
| simplify by adding and subtracting | 11/18/2003 |
| Q: I have been out of school for eight years and none of this stuck in the first place! 3/x-1 divided ... A: Sarah, I hate to say this, it gets boring after a while. If I solve the problem as it reads, you ... | |
| math | 11/5/2003 |
| Q: can you help me with oneif the points A, B, C and D form a parallelogram and A is (-1,8) , B is (3, ... A: Before we discuss this problem, please draw a scaled diagram showing the points ... | |
| probability please help asap | 11/4/2003 |
| Q: Fifty ping-pong balls, each marked with a different counting number from 1 to 50, are placed in a ... A: regarding your comments -"You totally confused me.. is the answer 3.5 percent.. because i did it a ... | |
| trig. and alg.2 | 10/27/2003 |
| Q: What is the center and radius of the circle x^2+y^2-6x+8y=0 A: Iris, Here is the question that I will pose to you. What is the definition of a circle. A circle ... | |
| slope | 10/22/2003 |
| Q: Use slope to show that angle ABC with vertices A(0,2), B(2,3), and C(1,5)is a right triangle. how is ... A: approach is still the same as the second question. use the formula given in one of the previous ... | |
| If the infinite product (1... | 10/21/2003 |
| Q: If the infinite product (1 + x)^2 (1 + x/2)^2 (1+ x/(2^2))^2 (1 + x/2^3))^2... can be ... A: Anrin, I got the answer buddy, but it is a lot of work just typing it here. I will show you my ... | |
| PRecAl | 10/9/2003 |
| Q: Could you also help with this one. I know how to begin but I don't understand once I get to the ... A: Okay, one way of solving this problem is to use linear models and a statistical method called ... | |
| PRecAl | 10/9/2003 |
| Q: Please help with this question. FInd the equation of the line that passes through A(-1.8,2.1) and ... A: My advise for you is not to focus on tackling just this question, but understand how to approach ... | |
| Rate Calculation | 10/9/2003 |
| Q: If someone can consume 20 pancakes in 30 minutes, he can eat 40 pancakes in 1 hour. Here is an ... A: * Mathematically, the left hand side expression of [1] and [2] are equivalent, since the product ... | |
| A group of 6 women and 4 men... | 8/19/2003 |
| Q: A group of 6 women and 4 men 3 will be selected ramdomly Find the probability that all will be men ... A: Let's look at a picture to understand what's going on. NOTATIONS: I use P(X[i]=x) to denote the ... | |
| 4 = The Part & 8 = The Whole | 8/12/2003 |
| Q: 12 is what part larger than 8? Solution: 12 - 8 = 4 4 (the part)/8 (the whole) = (answer) 1/2 ... A: I never use these terms myself, I am of the opinion that they should perhaps be used only as a way ... | |
| Weighted & Simple Averages | 8/11/2003 |
| Q: Is the example below a weighted average or a simple average since the quantities at the given prices ... A: If you do a plot of "number of boxes" versus "unit price", you will see a uniform distribution. Each ... | |
| Weighted Average | 8/1/2003 |
| Q: Can you explain what a weighted average is concerning the following? Five bonds and their percents ... A: Let me just clarify what is meant by a weighted average (WA). A weighted average over N items is ... | |
| math | 7/30/2003 |
| Q: Could you help with this quesiton. P,Q,R, and S are distinct integers. Find S if the following is ... A: The key to working out this question is in recognizing what the place value represents in the metric ... | |
| From Feet/Second To Miles/Hour | 7/28/2003 |
| Q: If someone or something can travel 25 feet in 30 seconds, how many miles per hour is this equal to? ... A: Since 1 mile = 5280 feet = 1.6093 kilometre and 1 hour = 60[sec/min]*60[min/hour] = 3600 seconds ... | |
| math????? | 7/20/2003 |
| Q: 500 g is equivalent to: one pound or 5 kilograms or 0.5kg or 0.05kg = ? Your help would be great, ... A: The answer is 0.5kg, since there are 1000 grams per kilogram (Kg). The prefix "kilo" (K) is ... | |
Basic Math
Answers by Expert:
Josh
Top Expert on this page
Expertise
When I work through problems, I like to emphasize concepts which I believe are worth noting. I will try to answer questions in the following areas, but not at the advanced level. Algebra. Sequences & Series. Trigonometry. Functions & Graphs. Coordinate Geometry. Quadratic Polynomials. Exponential & Logarithms. Basic Calculus. Probability, Permutation and Combination. Mathematical Induction. Complex numbers. Physics problems.
Experience
I have worked as a teaching assistant in college. My hope is that more people will share knowledge without boundary, give help without seeking recognition or monetary rewards.
Education/Credentials
Bachelor degree in Engineering Science
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