Basic Math - Math for Kids - Science

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About Josh
(Top Expert on this page)

Expertise
When I work through problems, I emphasize principles and key ideas 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. Exponentials & Logarithms. Basic Calculus. Probability, Permutations and Combinations. Mathematical Induction. Complex numbers. Physics problems.

Experience

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.

Supplementary Website:
See a selection of past questions in my maths repository under "Question Archive"

Education Credentials:
Bachelor degree in Engineering Science.

"Everyone struggles with something."

You are here: Experts > Science > Math for Kids > Basic Math

Questions Answered By Expert Josh
In Category Basic Math

Subject	Date Asked

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 - tan300tan210 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 - tan300tan210 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 66 c) 77=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 2pir, 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 ax+by=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 ...