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Algebra/Questions Answered by Expert Scott A Wilson
| Subject | Date Asked |
| Online exam, Help please! | 2/7/2012 |
| Q: 1. Evaluate (3x + 6) ÷ [y3(x + 2)] if x = 2 and y = 1. A) 9/4 B) 3 C) 15/12 D) 26 2. Simplify the ... A: 1. Evaluate (3x + 6) ÷ [y3(x + 2)] if x = 2 and y = 1. Note the expression is 3(x+2)/(y³(x+2)); y is ... | |
| Alebra 2 | 2/7/2012 |
| Q: Scott, I'm doing this class online and I really just want to graduate so far I've been doing good ... A: To solve these, I will call the distances u and v. In the x direction, I will call the distance ux ... | |
| Inverse Functions | 2/4/2012 |
| Q: Given f:x = 2x+p and fˉ¹:x = m(4x=3), where p and m are constants. Find the value of p ... A: y=2x+p, x=m(4y-3) The slope times the slope of the inverse is equal to 1. This means that 2 * 4m = ... | |
| simultaneous equation | 2/1/2012 |
| Q: I have a pair of equations that I have to solve simultaneously by using the substitution method. The ... A: The equation 7(4b + 1) - 5b + 6 = 0 is correct. If we multiply the 7 by 4b we get 28b. If we ... | |
| extra credit | 1/22/2012 |
| Q: I need help with this extra credit problem below: A ball is dropped from a height of 10m. It ... A: It can be seen that the 1st fall is 10m, since that is the distance to the ground. It can be seen ... | |
| solving equations using multiplication method | 1/21/2012 |
| Q: Ok so I have tried this tons of way and I keep getting decimal answers or a too high of an answer. ... A: Looking at 7x + 2y = 6, we can subtract 2y from both sides and get 7x = 6 - 2y. We can then divide ... | |
| extra credit | 1/16/2012 |
| Q: this is Megan, I need some help with this extra credit problem below: Fifty percent of what number ... A: Lets start with 10. It is known that 60% of 10 is 6, so 6 more than 10 is 16. Now 25% of 16 is 4, ... | |
| rectangle | 1/16/2012 |
| Q: Area of a rectangle is 50m2 Diagonal is 10m Perimeter? A: All measurements are in meters, so I'll just use numbers. The area is 50 and the diagonal is 10. If ... | |
| Algebra | 1/10/2012 |
| Q: I have the followingIs the following equation unique: A**n + B**m = C, where A, B,C, n and m are ... A: Perhaps if we take 36, which is 6^2. It is known that 3^3 + 3^2 = 27 + 9 = 36. It is also known that ... | |
| Algebra | 1/8/2012 |
| Q: I have the followingIs the following equation unique: A**n + B**m = C, where A, B,C, n and m are ... A: I found some examples using Excel. Take 2^3 + 3^2 and that is 8+9=17. Take 1^4 + 4^2 and that is ... | |
| Algebra | 1/6/2012 |
| Q: I have the followingIs the following equation unique: A**n + B**m = C, where A, B,C, n and m are ... A: If we have A, B, n, and m as 1, 1, 1, 1, then 1^1 + 1^1 = 2, and that's C. In fact, if they are 1, ... | |
| Polynomial expressions | 1/6/2012 |
| Q: I don't know how to solve these problems and my hw is due tomorrow - and it's 8 o'clock! The first ... A: Note that the (4m-9) is just 4m-9 and that -(6m+4) is -6m-4. This gives 4m - 9 - 6m - 4. Grouping ... | |
| Algebra | 12/21/2011 |
| Q: if x-(1/x)=3 ; now x+(1/x)=? A: Take x - 1/x = 3 and multiply by x, giving x² - 1 = 3x. Subtracting 3x from both sides gives x² - 3x ... | |
| ALGEBRA II I DESPERATELY NEED HELP BY TONIGHT. | 12/17/2011 |
| Q: I need major help with algebra. I'm doing a project in which I have to create a quadratic equation. ... A: Sorry the answer is so late and I'm not even sure this is on time, but that equation looks correct. ... | |
| Algebraic Expressions | 12/5/2011 |
| Q: Your company needs to temporarily hire a programmer to work on a project. Two proposed payment ... A: The 1st job would be 1,000 + 20x, where x is hours. The 2nd job would be 25x, where x is hours. To ... | |
| Algebra | 12/3/2011 |
| Q: I have a question in algebra that states... use the graph below to determine the slope so.(it was ... A: The general form of a line is y = mx + b, where m is the slope and b is the y-intercept. If the ... | |
| Independent & Dependent Variables? | 12/2/2011 |
| Q: I have a quick question, and I hope you can help. I have an assignment due today, and this is what ... A: One improvement might be to find two tables that have a touch of relation between them. An example ... | |
| math | 12/1/2011 |
| Q: x+4 3 ---- + --- 2x+6 x+3 A: This is easier to translate when written as (x+4)/(2x+6) + 3/(x+3). That way the lines don't have to ... | |
| College algebra | 11/29/2011 |
| Q: Solve this system by the addition methrod (2/5)x - (3/2)y=1 (1/3)x +(1/2)y=2 A: If we say equation 1 is [1] 2x/5 - 3y/2 = 1 and equation 2 is [2] x/3 + y/2 = 2, we can compute ... | |
| Algebra 2 | 11/29/2011 |
| Q: were learning about solving quadratic equations in my class right now and I'm stuck on a ... A: Divide both sides of the equation by 2. This gives (x-3)² = 4. Take the squareroot of both sides. ... | |
| Complex 4 Wheeler Automobile Design Model | 11/27/2011 |
| Q: This is regarding a Complex 4 Wheeler Automobile Design Model VIZ Cars, Jeeps, Lorries, Bus, Tempo ... A: 1st 1&2. If each vehicle is designed so that the driver can be in more than one location, this would ... | |
| Evaluation Function (Packing) | 11/25/2011 |
| Q: Good day, Here's my question. Let us say I have rectangle pieces packed in a larger rectangle ... A: O sent the graph as an attachment again, but this time made it larger. The image you sent looks ... | |
| Evaluation Function (Packing) | 11/25/2011 |
| Q: Good day, Here's my question. Let us say I have rectangle pieces packed in a larger rectangle ... A: A graph was sent back, since it cam through poorly as |128*32 |64*64 |64*32 | ... | |
| Question about functions | 11/21/2011 |
| Q: Your company would like to know how sales levels affect profits. If too few items are sold, then ... A: It is known that P(x) = –x^2 + 110x – 1,000. Given this, it can be said that P(5) = -25 + 550 - ... | |
| SETS AND FUNCTIONS | 11/21/2011 |
| Q: 1.Consider the example of the states of the United States and their U.S. senators. You can say that ... A: 1. Look at pinecones that are still in the tree. Given a pinecone, it can be seen which tree it is ... | |
| BEST WAY TO SOLVE QUADRATIC EQUATIONS | 11/21/2011 |
| Q: 1.There are various methods of solving quadratic equations. ◦Explain which you think are the ... A: 1. Quadratic equations are done by factoring if it is obvious how to factor them. They are done with ... | |
| HELP ASAP! solving system of equations | 11/20/2011 |
| Q: y= x squared-5x-18/ x+3 y= 3x+2 THANKS! A: If the 2nd equation is y = 3x + 2, put that in the 1st and get 3x + 2 = (x² - 5x - 18)/(x+3). ... | |
| pre-algebra | 11/19/2011 |
| Q: need help to solve algebra math problem 36x+24=6(6x+4)= A: Note that 36=2*2*3*3 and 24=2*2*2*3, so they both have a 2*2*3 in them, and 2*2*3=12. Either that, ... | |
| algebra | 11/17/2011 |
| Q: -3(4-x)+7x=4+5x And Show How You Did It With Explanation And Show Every Step.. A: Take -3(4-x)+7x=4+5x and right in a clearer format, as -3(4-x) + 7x = 4 + 5x. Drop the parenthises ... | |
| Terms | 11/10/2011 |
| Q: I can't quite get the hang of terms/distributive property etc. A: The distibutive prpertiy is a reference to distributin a multiplier over a set of parenthesis. If we ... | |
| Olympics Games Medals. | 11/8/2011 |
| Q: http://en.wikipedia.org/wiki/Olympic_Games http://en.wikipedia.org/wiki/Olympic_medal ... A: Why only the Top Three? Why aren't the Top Four or the Top Two winners considered by the Olympic ... | |
| Solving Problems Using Equations | 11/6/2011 |
| Q: The sum of the smaller of two consecutive integers and twice the larger integer is 47. What are the ... A: The smaller is x, so the larger is x+1. The sum of the smaller and twice the larger is x + 2(x+1) = ... | |
| Vector spaces | 11/6/2011 |
| Q: I'm really stuck on a question for homework (I'm a first year undergrad) on vector spaces. I don't ... A: To be linearly independent, all three vectors need to form a 3x3 invertible matrix in which the rows ... | |
| Quadratic equation | 11/3/2011 |
| Q: Solve -16x²+32x+17 using the quadratic equation. A: Given that we have y = ax²+bx+c, it is known that y = (-b ± √(b²-4ac))/(2a). Here, a=-16, ... | |
| math | 11/2/2011 |
| Q: i have two questions im hoping you can walk me through with.... thy are both attached and i have ... A: On my PC, the problems come across very tiny, so I'm not sure I read them correctly for the text is ... | |
| EQUATIONS | 10/31/2011 |
| Q: Hey Scott, Lindsey here again got 12 probelms and more to come I wish there was a way to send ... A: 1. Subtract s from 9. the result is 9. The equationn is 9 - s = 9; subtract 9 from both sides and ... | |
| Rate of Decay | 10/27/2011 |
| Q: 100(.5)^n=0 I'm finding the rate of decay. N is the number of years. The equals 0 is when there is ... A: This is not possible, for 0.5^n is always positive, and 100 times a positive is still a positive. ... | |
| Math | 10/26/2011 |
| Q: "I was given a=13; y=7; a-y=6. Using these make an equation that gives 87 as it's answer. Then use ... A: If we take a=13, y=7. and a-y=6, and are suppose to get 87, then it could be 87a/13 = 87. If we put ... | |
| please help me on this equation | 10/25/2011 |
| Q: solve 2x-y=y for x A: To solve an equation for x, make sure all of the terms with x in them are on one side. The only term ... | |
| 8th Grade algebra question | 10/23/2011 |
| Q: You you please help me Solve: 3(g+4)-5=g A: The 1st thing to do here is to get rid of the parenthesis, so multiplying the left side out gives 3g ... | |
| Scrabble Board Game - Reinventing - Maths Application. | 10/21/2011 |
| Q: http://en.wikipedia.org/wiki/Scrabble Current Board Design ------------------------ 15*15 square ... A: Yes, it can be done. The primary differences would be the size (much bigger than 8x8) and ... | |
| multinomial expansion | 10/21/2011 |
| Q: Sir I am having problem in the questions in the image.Sir plzzzz give clear and explanatory ... A: For question 1, the number of terms can be computed by knowing how many terms there are to start ... | |
| transitions | 10/20/2011 |
| Q: only 2/5 of the students doubted. if 600 students were non doubters, how many students were there in ... A: If 2/5 of the students doubted, that means that 3/5 of the students didn't doubt. It is given that ... | |
| Algebra Substitution | 10/20/2011 |
| Q: 2x-3y=7 3x y=5 A: I will assume the equations are 2x-3y=7 and 3x+y=5. Take the 2nd equation, 3x+y=5, and subtract 3x ... | |
| multinomial expansion | 10/19/2011 |
| Q: Sir I am having problem in the questions in the image.Sir plzzzz give clear and explanatory ... A: 1. The number of terms would depend on how many powers of x there would be. Since we have x to the ... | |
| algebra | 10/18/2011 |
| Q: What is the definition of special case in math. A: I don't know what special case is being dicussed. A special case is one where something special is ... | |
| algebra 1 | 10/13/2011 |
| Q: i need help with the following problems 6-b=5b+30 5y-2y=3y+2 5x+2=2x-10 1/2b+4=1/8b+88 A: For 6 - b = 5b + 30, subtract 5b from both sides and get 6 - 6b = 30. Subtract 6 from both sides and ... | |
| Finding Quotient & Remainder of Polynomials | 10/12/2011 |
| Q: 4x^5 - 3x^2 + x+1 divided by 2x^3-1 A: Notice that the terms are really 4x^5 + 0x^4 + 0x^3 - 3x^2 + x + 1 divided by 2x^3 + 0x^2 + 0x - 1. ... | |
| Pre-Algebra Question | 10/11/2011 |
| Q: 5 - m = 13 solve for m A: Take 5 - m = 13 and add m - 13 to both sides. This gives 5 - m + m - 13 = 13 + m - 13. One the left ... | |
| symmetric matrix | 10/10/2011 |
| Q: i would like to know what the logic behind the square of a symmetric matrix being symmetric is? what ... A: When two matrices are multiplied toegether, the answere of the element in the ith row and jth column ... | |
| Pre-Algebra | 10/9/2011 |
| Q: 4d+9d-(7-6d)=4d+9d-7-6d =4d+9d-6d-7 =7d-7 A: It should be noted that on the parenthesis, each term inside is multiplied by what is out front. ... | |
| math teacher | 10/9/2011 |
| Q: My teacher has been very mean to me. he has slammed my reading book on my desk saying my answer was ... A: I would have one of my parents get in touch with the teacher. If this doesn't help, have them ... | |
| permutations and combinations | 10/8/2011 |
| Q: Sir I am an eleventh standard student and having difficulty in solving questions on permutations and ... A: A permuation involves factorials. In other words, P(a,b) = a!/(b!(a-b)!). An example would be ... | |
| math question | 10/5/2011 |
| Q: if 2x=3y2 then the variation of x with respect to y is.... A: Is that 2x = 3y²? There is no way to determine this value. If the values in x are (1,2,3,4,5), the ... | |
| solving equations with different variables | 10/4/2011 |
| Q: 5x+2y=7. Solve for y A: The first thiing to do is isolate the expression with y, so subtract 5x from both sides. This gives ... | |
| Algebra 2 | 10/3/2011 |
| Q: Im having trouble with these 5 problems. Find the solution set of the inequality: | 2 y - 3 | < 11 ... A: Note that wheren there is an absolute value, it sets up two sets of two inequalities to solve . That ... | |
| Algebra | 9/25/2011 |
| Q: Soybean meal is 20% protein, cornmeal is 6% protein, How many pounds of each should mix together in ... A: Soybean is 20% and cornmeal is 6%, and we want a total of 9% out of 240 lb. That means if we use x ... | |
| math | 9/25/2011 |
| Q: A boat travels 10 km upstream and 10 km back.the trip upstream and back take 1.5 hrs.if the speed of ... A: It is known that distance = rate * time. It is further known that the downstream rate is 5kph ... | |
| vectors | 9/20/2011 |
| Q: question is in the image A: If A and B are two dimenional positve integer vectors, then 52 = 6^2 + 4^2. This means A is (4,6) or ... | |
| need someone elses opinion | 9/19/2011 |
| Q: The domain of x is {-1, 0, 2}. Solve the equation: -2x + y = -3 Correct 2. The domain of x is ... A: I assume if they are labeled correct, you got them right? I will look at problems marked incorrect. ... | |
| inequality | 9/11/2011 |
| Q: the question is attached as gif file @@@@@IMAGE:86574:Algebra-2061/2011/09/inequality_2.gif##### ... A: It is known that ln(n^2)(ln(n)-1) = 2ln(n)(ln(n)-1). If n=e, we have 2(1-1) = 0, and that is less ... | |
| inequality | 9/10/2011 |
| Q: the question is attached as gif file A: ln(n^2)(Ln(n)-1) < n That would be the same as 2*ln(n)[ln(n)-1]. If n = e, we have 1(1-0) < e, and ... | |
| Grouped Frequency Distribution? | 9/10/2011 |
| Q: Scott. I have a quick question for you. So, my problem says, "Given the bar graph, create a grouped ... A: I would use table I. Due to the fact that time is a real number, putting it between 6 and 7 hours ... | |
| Algebra 2 Honors | 9/7/2011 |
| Q: Solve the inequality. Graph the solution on a number line. y+7 < 2y+2 < 0 I keep trying and I ... A: Solve y + 7 < 2y + 2 and 2y + 2 < 0, then take the intersection of the two. For the 1st inequality, ... | |
| Quadratic Equation | 9/7/2011 |
| Q: http://en.wikipedia.org/wiki/Quadratic_equation As seen from the definition, a quadratic equation ... A: 1) Read http://plus.maths.org/content/101-uses-quadratic-equation to see uses. 2) I have seen the ... | |
| solving linear programing problems | 9/5/2011 |
| Q: An airline with 2 types of airplanes, p and q, has contracted with a tour group to provide ... A: I have included the answer as an attachment. First, choose the most negative element in the top row ... | |
| Linear Equation | 8/30/2011 |
| Q: The average life expectancy increased linearly from 62.9 years for a person born in 1940, to 75.4 ... A: a) If year 1940 is when x = 0, then in 1990, x = 1990 - 1940 = 50. The change in y is 75.4 - 62.9 = ... | |
| Domain & Range/System of Linear Equations | 7/27/2011 |
| Q: 11. Find the linear equation in slope-intercept form given the following information: m = -1 and b ... A: It is known that the answer is y = mx + b. Since we are given m = -1 and b = 1/2, that is, y = -x + ... | |
| algebra | 7/26/2011 |
| Q: 31. Divide: 4u^4-4u^3-5u^2 -9u-1/2u - 1 32. Divide: 2a^3 + 8a^2 - 3a + 8/a + 4 33. Divide: ... A: To divide, use sythetic division 31. Divide 4 -4 -5 -9 -1 by 2 -1 2 goes into 4 twice, so muliply ... | |
| Algebra 2, Circles | 7/25/2011 |
| Q: Can you please show work calculating the equation of the circle that is center on line x + y = 4; ... A: For the circle to have a center on the line x+y=4 and be tangent to both the x and y axis, the ... | |
| Colouring cube | 7/6/2011 |
| Q: This question is really confusing for me: In how many ways can the 6 surfaces of a cube be coloured ... A: To do this, lets number the colors 1, 2, 3, 4, 5, and 6. Note that no matter which way the cube is ... | |
| Permutation and combination | 7/6/2011 |
| Q: I've tried to solve this problem but i can't. Please help me. *How many mixed doubles tennis teams ... A: For each game, we need two men and two women. For choosing 2 men it would be 6 choose 2 = ... | |
| Quadratic equations and graphing quadratic equations | 7/2/2011 |
| Q: "I am having difficulty with a few problems in my college algebra class. Thank you so much for your ... A: 1. (x-2)² = 20; taking the square root of both sides gives x-2 = ±√20. Now 20 = 4*5 and ... | |
| algebra | 6/26/2011 |
| Q: multiply (x^3-x^2)(x^3+x^2) A: If we say A = x^3 and B = x^2, we have (A-B)(A+B). This is A^2 + AB - AB - B^2 = A^2 - B^2. So, ... | |
| Explanation behind exponents that are fractions or irrational | 6/20/2011 |
| Q: When it comes to 5^5 I understand that this is a short way of saying 1X5X5X5X5X5. I understand that ... A: When multiplying numbers together, exponets are added. For example, 2²·2³ = 2*2 * 2*2*2 = 4*8 = ... | |
| quadratic equation from India | 6/17/2011 |
| Q: I have a question regarding an example given in my text book. It involves the method for solving ... A: There are at least 3 different approaches to this problem. The equation given is x² + 3x - 10 = 0. ... | |
| Radical expressions and radical equations | 6/17/2011 |
| Q: I am on my second semester of algebra in college and need help with a few problems. Thank you very ... A: 1. Multiply. (√7+1)(2√7+1) We need to multiply each term in the first set by the second, ... | |
| quadratic equation | 6/7/2011 |
| Q: 2x^2- 3x-5=0 I have to solve this equation using the Indian 6 step method and I am having a lot of ... A: Here, a=2, b=-3, and c=-5. The quadratic equation is (-b +/- sqrt(b^2 - 4ac)/(2a). Putting in a, b, ... | |
| math | 6/5/2011 |
| Q: how do you solve the inequality and graph the solution -4x+2.5x<=1.5(x+2)? A: Combine the x's on the left, giving -1.5x <= 1.5(x+2). Multiply out the right side, giving -1.5x <= ... | |
| algebra/quadratic equations | 5/27/2011 |
| Q: with the formula: tickets = -.2x^2 + 12x +11 does the graph open up or down? ANSWER: The sign of ... A: I put the equation in Excel, then copied in the results: 0 11 1 22.8 2 34.2 3 45.2 4 55.8 5 66 ... | |
| integration | 5/24/2011 |
| Q: Find x in the equations in the image A: (2x)^ln(2) = (3y)^ln(3) and 3^ln(x) = 2^ln(y). Applying the ln() to each allows the exponent to be ... | |
| Algebra | 5/5/2011 |
| Q: The perimeter of a NBA-sized basketball court is 288 ft. The length is 44 ft longer than the width. ... A: The court has a length that is 44' longer that the width, so L = W + 44. The perimeter is twice the ... | |
| Math | 5/2/2011 |
| Q: List the possible rational roots for the equation: x3 + x2 - 4x + 4 = 0 {±1, ±2, ±4} ... A: If one of the signs was different, it could be x3 - x2 - 4x + 4 = 0 (x^2 - 4)(x^2 - 1). Even if ... | |
| helpp!!! | 4/27/2011 |
| Q: Ok so, the area of a rectangle is 440 square mm. The height is seven more than three times the base. ... A: Let's give the base length x. The height is 7 more (which means + 7 to the other side) than 3 times ... | |
| algebra | 4/26/2011 |
| Q: using the quadratic formula find the roots of this equation: x^2-4x-6=0 A: The quadratic formula is x = (-b +/- sqrt(b^2 - 4ac))/(2a) for ax^2 + bx + c = 0. In this equation, ... | |
| algebra question | 4/25/2011 |
| Q: A basketball field house seats 15,000. Courtside seats sell for $8, endzone for $6 and balcony for ... A: The problem is a matrix of three variables and three unknowns. Let the seats be x=courtside, ... | |
| maths | 4/21/2011 |
| Q: Pls help me to solve this Q(1a)solve the inequality 2{x-2}/3-1{x+5}/6 less than or equal to 0. ... A: As I read them, the questions are sent first and then answered here as well. Let me know if they are ... | |
| Algebra-Addition method | 4/17/2011 |
| Q: Please help me understand system by addition method. Having a hard time understanding this part. I ... A: Rewrite the equations as 4a - 3b = -11 and 5a + 2b = 38. Solve these two equations for a and b, then ... | |
| Story problems using logarithms | 4/16/2011 |
| Q: Hey Scott I really could use your help again! USA manufacturing has determined that when x units are ... A: To find the minimum, first the total revenue must be found. That would be the number of products ... | |
| college alegbra | 4/15/2011 |
| Q: Annual profit in thousands of dollars is given by the function, P(x) = 12x + 10,000, where x is the ... A: 1. Since there are 12 months in a year, x must be the number of months. 2. That must be the base ... | |
| logarithm!!!! | 4/14/2011 |
| Q: Express the logarithm in terms of log2M and log2N: log2(MN)4 A: It is known that [1] log(ab) = log(a) + log(b) and [2] log(a^n) = n*ln(a). This mean that if we are ... | |
| polynomials | 4/13/2011 |
| Q: how do u divide (4x^3-3x^4+5x^3-6x^2-8x+10)/(2x^2) A: Apply it to each term. Dividing by 2 is just dividing by 2. Dividing by x^2 means subtracting 2 ... | |
| digit problem | 4/8/2011 |
| Q: the sum of the digits of a two digit number is 7 times the difference. the number itself exceeds 4 ... A: The number is 10a + b, where a and b are the digits. It is said that a+b = 7(a-b) or 7(b-a), ... | |
| age problem | 4/7/2011 |
| Q: a man is six times as old as his son.in 7 1/2 years, he will be just three times as old as his son ... A: Since 7.5 is mentioned, that must mean age is being looked at as having a half in it. Let the ... | |
| Algebra Help? | 4/4/2011 |
| Q: Need some help with simplifying. Thank you! Here is the equation: Simplify: [3 5/7 ∙mn]/[2 ... A: First, put number in factor form. That is, 3 5/7 = 26/7 and 2 4/5 = 14/5. The 1st of each gives ... | |
| algebra | 4/4/2011 |
| Q: the perimeter of a rectangle is twice the sum of its length and its width. the perimeter is 40 ... A: Let the rectangle be x by y, y being the length. The perimeter is 2x + 2y, and that is 40, which ... | |
| Algebra | 4/1/2011 |
| Q: Factorise: 27x^6+8x^3+1 ANSWER: It is know that 27x^6 is always non-negative. It is known that 1 ... A: Multiply the (9x^4 + 3x^3 - 2x^2 + x + 1) by 3x^2, -x, and 1, then add together. (9x^4 + 3x^3 - 2x^2 ... | |
| motion problems (algebra) | 3/31/2011 |
| Q: the current in a stream moves at a speed of 3km/h. a boat travels 40km upstream and 40km downstream ... A: The current speed is 3 km/h, the total distance is 40+40=80 km, and the total time is 14 hours. The ... | |
| collegebeginningalgebrahowtocombineliketerms | 3/31/2011 |
| Q: 2s14+3s13+12s12-s10 A: The subject is, "College Beginning Algebra - How To Combine Like Terms". I assume the equation is ... | |
| Algebra | 3/31/2011 |
| Q: Perform the indicated operations and simplify the results, leave your answer in factor form. ... A: Note that x^2-4 = (x+2)(x-2) and that 2x+4 = 2(x+2). Thus, multiply the 1st by 2/2 and the 2nd by ... | |
| algebra using addition/subtraction method | 3/30/2011 |
| Q: 17x-6y=403 2x+9y=193 Please help me with the steps A: Take 2/3 times the 2nd equation and add it to the 1st equation to get rid of y. This gives (17 + ... | |
| algebra 2 compositions | 3/29/2011 |
| Q: I have to solve f of g where f(x)= 4/(-x-2)+2 and g(x)= -1/(x+3) thank u for helping I don't know ... A: If you mean find where f(g(x)) is 0, take g(x) and put it in f(x) wherever x occurs. That is, ... | |
| xtra credit | 3/29/2011 |
| Q: A liitle help yet again... Abe has a bag containing 340 coins and 160 bills totaling $1809. There ... A: Contents 340 (pennies/nickels), 160 ($5/$10/$20)bills, $1809 total. Let x be the number of $20's. ... | |
| Algebra | 3/28/2011 |
| Q: Factorise: 27x^6+8x^3+1 A: It is know that 27x^6 is always non-negative. It is known that 1 is positive. This means as x gets ... | |
| extra credit over spring break | 3/27/2011 |
| Q: Abe has a bag containing 340 coins and 160 bills totaling $1809. There are pennies and nickels for ... A: Contents 340 (pennies/nickels), 160 ($5/$10/$20)bills, $1809 total. Let x be the number of $20's. ... | |
| Algebra | 3/26/2011 |
| Q: Extra Credit--Please Help F(x)= -x^4 + X^2 What is the X intercept? At what zeros does the function ... A: The function is x^2(-x^2+1), which is the same as -x^2(x^2-1). The x intercepts can be seen to ... | |
| What is work of Algebra? | 3/25/2011 |
| Q: i have a question that what is main function of algebra . and what is work of algebra in our daily ... A: Algebra is used in finding perimeters, areas, volumes, and slopes. Good places to look for formulas ... | |
| Lines | 3/24/2011 |
| Q: Let L be the line with slope 5/12 that contains the point A=(24,-1) and let M be the line ... A: Since the slope of the first line is m = 5/12, the slope of the perpendicular line is -1/m, and that ... | |
| Polynomials | 3/22/2011 |
| Q: which of the following is equivalent to 3a+4b - (-6a-3b) A. 16ab B. -3a + b C. -3a + 7b D. 9a + b E. ... A: The 1st thing to do is to drop the parenthesis by applying the minus to both terms. Since both of ... | |
| help | 3/22/2011 |
| Q: (y+3)/(y^2-2y-3)-(7)/(y^2-1) how do i preform indicaated operation for this A: To perform the subtraction, the two fractions need a common denominator. The 1st fraction has ... | |
| help on extra credit | 3/20/2011 |
| Q: A little help here? Anna is reading a 300-page book. She can read a page in 2 minutes. If she has ... A: If she reads a page in 2 minutes, then take the number of pages timjes 2 to get the number of ... | |
| To calculate hourly rate... | 3/19/2011 |
| Q: there. I recently started at a position that pays in salary form, at 50 hours a week, and I wanted ... A: There are normally 40 hours in a week, so 50 is 40 hours + 10 overtime hours. Overtime is usually ... | |
| Equation | 3/19/2011 |
| Q: Can you solve 3x^2-2x+1=0 A: Yes I can, and that's an answer, but we both know that I need to write more. The factors of the ... | |
| Factoring | 3/18/2011 |
| Q: I have totally forgoten how to do this 2x+6x+9=0 A: If that is 2x + 6x, then 2 and 6 are both timex x. That means it can be written as (2+6)x + 9 = 0. ... | |
| Weighted Averages | 3/16/2011 |
| Q: You recently posted a question to Richard J. Raridon in category Algebra: I have a question about ... A: I would take the total calls for Domestic and Exec, which are 5572 and 104, and add them together, ... | |
| math question, I forgot after all these years | 3/15/2011 |
| Q: 4/2800=.6895/X A: Now 4/2800 is the same as 1/700 since 4/4 = 1 and 2800/4 = 700. This means we have 700 = 0.6895/X. ... | |
| Survey of mathematical methods | 3/13/2011 |
| Q: using the method to solve quadratic equations that came from India how would i solve this: ... A: If you got 4x^2 - 8x + 4 = 56, I would factor that into (2x-2)(2x-2) = 56. It could then be said ... | |
| extra credit algebra | 3/13/2011 |
| Q: Scott! A little help here? :) If 64 tiny squares make a square inch, how many tiny squares will make ... A: If 64 make a square inch, that means they are 1/8" long and wide, so they fit in a pattern that is ... | |
| algebra question | 3/11/2011 |
| Q: If 64 tiny squares make a square inch, how many tiny squares will make a cubic foot? (Hint: How ... A: If 64 tiny squares make a square inch, then each square is 0.125" on a side. Since the problem then ... | |
| logarithms | 3/10/2011 |
| Q: if log of sinx with base cosx + log of cosx with base sinx =2 then find tanx ANSWER: Looking at ... A: I'm sorry about that - what I really meant was π/4. That is, sin(π/4) = cos(π/4) = ... | |
| math | 3/8/2011 |
| Q: i forgot how to solve for X (x-13/x)=95% A: To start off with, I'll rewrite the problem as I think it should be, and that is (x-13)/x = 0.95. ... | |
| Algebra Word Problem | 3/5/2011 |
| Q: What digits do the letters represent in this sum? Each letter can be replaced by only one digit, ... A: Since each starts with an O and the result is 3 digits, this means that O is 1 or 2. Since there are ... | |
| Algebra | 3/2/2011 |
| Q: I'd like to know the proper way to work this problem: (2/3)3-2 (two thirds cubed minus two). I have ... A: It is usually written as (2/3)^3 - 2. Now (2/3)^3 is the same as 2*2*2/(3**3*3), which is 8/27. ... | |
| Mathematics | 2/27/2011 |
| Q: P(t)=c/((1-P_0/c) e^(-rt) ) Where P_0=Initial Population (271.31) c = carrying capacity P = ... A: To make it look simpler, I'll rename P(t) as x, P_0 as y, and e^(-rt) as z As I read it, the ... | |
| algebra1 | 2/27/2011 |
| Q: The sum of two numbers is 119. There difference is 79. What are the numbers? A: If a+b = 119 and a-b = 79, then add the two equations together and get 2a = 198. Dividing both sides ... | |
| y=mx+b | 2/26/2011 |
| Q: I'm alittle confused with this question and the y-intercept. Selina is filling the bath tub at a ... A: Yes, you've got it done correctly so far. Just so we both know the x is in the numerator, I find ... | |
| Algebra | 2/25/2011 |
| Q: How do I find the difference quotient of f, that is find f(x+h)- f(x)/h. F(x) =x^2-3x+4 X^2 is ... A: To compute them, take x+h and x and put each of them in the function. Putting x+h in for x gives ... | |
| Find the center and radius of a circle with the given equation | 2/24/2011 |
| Q: 3x^2+2x+3y^2+0y-8=0 A: First, the coefficient on x^2 and y^2 needs to be one, so divide the whole equation by 3. This ... | |
| slopes | 2/22/2011 |
| Q: Can you help me figure how to find the slope number to this equation? 2x-3y+6=0 A: All lines can be put in the form y = mx + b, where m is the slope and b is the y intercept. That is, ... | |
| Algebra Word Problem... | 2/21/2011 |
| Q: The number of chickens and hogs in the barnyard add to 18. They have a total of 50 legs. How many ... A: Let C be the number of chickens and H be the number of hogs, C + H = 18. The number of legs is 2C + ... | |
| mathematics | 2/19/2011 |
| Q: the fifth, ninth and sixteenth terms of a linear sequence (a.p) are consecutive terms of an ... A: 5th term: a + 5b 9th term: a + 9b 16th term: a + 16b To be in an exponential sequence, we know that ... | |
| do you know the answer to this math problem | 2/18/2011 |
| Q: if 57 people use 13,224 cans in one year, how many cans are used in a city which has a population of ... A: Take (1,963,000 people)(13,224 can/57 people) = x cans since people/people cancels. Now 13,224/57 = ... | |
| Math | 2/17/2011 |
| Q: If 27783=3^x . 7^y .What is xy? (It means 3 to power x multiply by 7 to the power of y) a-3 b-4 ... A: Take the number 27783 and see how many times it can be divided by 3. Thus, 27783/3 = 9261; 9261/3 = ... | |
| Pre-Algebra Conversions | 2/17/2011 |
| Q: A large ant 24cm in 3 sec. What was the average speed in meters per hour? A: Multiply 24 cm/sec by (1 in/2.54 cm)(1 ft/12 in)(1 mile/5280 ft)(60 sec/1 min)(60 min/1 hr). The ... | |
| Solving for given variable | 2/16/2011 |
| Q: Ive been doin some mathalgebra problems and i came across 2 of which i couldnt solve 10 + 2x = 5x - ... A: For the 1st one, subtract 2x from both sides and add 5 to both sides. That is, add 5 - 2x to both ... | |
| series | 2/16/2011 |
| Q: Find the sum to 'n' terms:1^2-2^2+3^2-4^2+....... A: That is the same as 1-4 + 9-16 + 25-36 + .... and that is -3 + -7 + -11 + .... For n even, that can ... | |
| algebra | 2/16/2011 |
| Q: 5x-2y=4 x+2y=8 -3x+2y=11 3x+y=-19 A: For 5x-2y=4 and x+2y=8, add them together. This gives 6x = 12. When both sides are divided by 6, ... | |
| Finding real solutions for an equation | 2/15/2011 |
| Q: Find all real solutions of the equation . (x-2)^2=16 Can you explain the steps to solve this ... A: It is known that if t^2 = 16, t = -4 or t = 4. Since t = x-2, the equations to solve are x - 2 = -4 ... | |
| Extra Credit | 2/15/2011 |
| Q: Hey, Scott! I have an extra credit word problem I would appreciate some help with...here it is: If ... A: To get 575 drops at one drop every 2 secondds would be 1150 seconds. This is the amount of time to ... | |
| algebra | 2/15/2011 |
| Q: I need help with this eqaution: 5(x+3) ------- = 3x-1 4 A: With 5(x+3)/4 = 3x - 1, multiply both sides by 4. On the left side, 4/4 cancels, leaving 5(x+3), ... | |
| Cross multiply with lcd | 2/11/2011 |
| Q: X+1/x+6 + 1/x = 2x+1/x+6 A: The equatioin looks like it should be (x+1)/(x+6) + 1/x = (2x+1)/(x+6). This said, multiply the ... | |
| Algebra Question | 2/9/2011 |
| Q: The measure of the largest angle of a triangle is 45 degrees more than the measure of the smallest ... A: Are you sure that 6 is not suppose to be a 60? If it were a 6, it would not be the middle size ... | |
| can you help solve the following question | 2/9/2011 |
| Q: A new cruise ship line has just launched 3 new ships:the pacific paradise, the Caribbean paradise, ... A: Let the Pacific Paradise have X deluxe staterooms. From this, it is known that the Carabbean ... | |
| algebra | 2/6/2011 |
| Q: A running back weighing 220lbs is running due west toward the goal line. A 250lb linebacker ... A: To answer this question, compute the forward and side to side motions of each. The result is the ... | |
| vectors | 2/5/2011 |
| Q: Are you able to assist me with these? Find the x and y components for each of the following ... A: #1 The answer is almost right, but the x and y are flipped in the return answer. This might be since ... | |
| Math | 2/5/2011 |
| Q: ax+b=0 for x A: Looking at ax + b = 0, we want to solve for x. The 1st thing to do is get the x term by itself. The ... | |
| vectors | 2/5/2011 |
| Q: Are you able to assist me with these? Find the x and y components for each of the following ... A: 1. If 118 is the length of a line at 310 degrees, then that is in the 4th quadrant. The basic ... | |
| Quadratic parent functions | 2/4/2011 |
| Q: I need help with quadratic parent functioning please. How would you solve y=x squared for an ... A: If y = x², that means if x = 0, then y = 0² = 0. If x = 5, then y = 5² = 25. If x = -7, then y = ... | |
| Algebra | 2/3/2011 |
| Q: Given the equation of a line y = -x + 4 what is the slope of any line perpendicular to that line? ... A: Given the slop of a line is m, the slope of a perpendicular line is -1/m. The point-slope form of ... | |
| Precalculus Word Problem | 2/3/2011 |
| Q: Your company has purchased a $12,000 machine that has a useful life of 8 years. The salvage value ... A: Since the value stats at $12,000 and ends at $2,000, that means there is a loss of $10,000. Since ... | |
| algebra 2 - invest | 2/2/2011 |
| Q: How do you solve this scenario and which one would you chose Scenario A: invest 5000 at 6.5 % ... A: A: Since 6.5% is compounded quarterly, the interest per quarter is 6.5/4 = 1.625%. That answer is n ... | |
| Factoring Cubic Functions | 2/1/2011 |
| Q: I know this is an extremely easy question, but i was hoping that if it is answered, i could finally ... A: When factoring x³ - a³, it is (x-a)(x² + ax + a²). Here, a³ is 8, so a is 2. The factors can then be ... | |
| Solving Multi-step equations? | 2/1/2011 |
| Q: How do I find three consecutive integers whose sum is 96? A: It is known that the three consecutive integers are n, n+1, and n+2. Adding them together gives n + ... | |
| need hel[p solving this equation | 1/30/2011 |
| Q: 5-2(x-4)= -2 A: When soliving problems like this, almost always multiply out the parenthesis first. Once this has ... | |
| algebra | 1/27/2011 |
| Q: The sum of the ages of a gold coin and a silver coin is 55 years. The age of the gold coin 15 years ... A: Let G be the age of the gold coin and S be the age of the silver coin. It is given that G+S=55. It ... | |
| algebra | 1/27/2011 |
| Q: Two angles are supplementary. The larger angle is 90° more than two times the measure of the smaller ... A: I will call the two angles A and B. They are supplementary, so the sum is A + B = 180°. Let A be the ... | |
| complex zeros | 1/27/2011 |
| Q: Find the complex zeros of F(x). Write F in factored form. F(x)=x^3-3x^2+12x-10 A: It can be seen that if 1 is put in, we get F(1) = 1 - 3 + 12 - 10 = 0. Therefore one of the factors ... | |
| help explan how to solve for the f variable | 1/26/2011 |
| Q: 8f + 7 = 5g ------- 3 A: To write the equation on one line gives (8f + 7)/3 = 5g. Multiplying both sides by 3 gives 8f + 7 = ... | |
| rational expressions | 1/20/2011 |
| Q: i dont know how to type the equation so i uploded a picture A: All that is in the picture is the equation. If r is not 2 or -2, the expression can be evaluated. ... | |
| algebra 2 | 1/17/2011 |
| Q: Mel's recent scores when blowing were 78,89,98,67,and 90. what must he score for the next game to ... A: Since he has 5 scores already, one more score will make 6. That means (78+89+98+67+90+x)/6 = 85. To ... | |
| finding the sum of an infinite geometric series | 1/17/2011 |
| Q: I'm not sure how I should write the equation since its got some symbols and stuff that I dont know ... A: The definition given assumes the series starts with n = 0. The problem starts with n = 1. So this ... | |
| A hard motion problem... need help | 1/17/2011 |
| Q: At the beginning of a walk, Rizza and Angel are 30 km apart. If they leave at the same time and walk ... A: Rita will overtake Angel in 6 hours. If R is the hourly speed of Rita, Rita will travel 6R in six ... | |
| Vectors | 1/14/2011 |
| Q: What is the use of finding dot and cross product of vectors? I don't know why we are finding. What ... A: For the dot product between two vectors, they come out to follow v · w = ||v|| ||w|| cos(A), where A ... | |
| Algebra | 1/10/2011 |
| Q: Solve Y=1/3X-5 X-y/5=13 thx A: Putting the 1st equation into the 2nd equation gives x - (x/3 - 5)/5 = 13. That is, (1 - 1/15)x + 1 ... | |
| Graphing Systems of Equations (Algebra) | 1/9/2011 |
| Q: Put x-y=3 into slope-intercept form. A: The slope-intercept form is y = mx + b, m is the slope, b is the y intercept. Subtracting x from ... | |
| Quadratic Equations | 1/6/2011 |
| Q: Sir, I have question related to quadratic equations. 1.) 8x^(3/2) - 8x^(-3/2) = 63 2.) 2^(2x+3) - ... A: 1) The problem can be rewritten as 8x^1.5 - 8/x^1.5 = 64. If x^0.5 is 2, then x^1.5 is 8 and 1/x^1.5 ... | |
| slope-intercept equation with fractions | 1/5/2011 |
| Q: ..I'm trying to graph the following slope-intercept equation, and can't remember how to do it with ... A: The general form of an equation is y = mx + b where m is the slope and b is the y intercept. Thus, ... | |
| Algebra | 1/4/2011 |
| Q: im in 8th grade in algibra 1 and i need to know the steps to solving the elimination method. one of ... A: The 2nd equation has a 1 as the coefficient on x, and if 2y is subtracted from both sides, we get x ... | |
| substitution | 12/29/2010 |
| Q: how can i solve 5x+300y=178 4x+500y=197 in substitution method? A: Solve the first equation for y, This means to 1st, subtract 5x from both sids. This gives 300y = ... | |
| algebra problem | 12/22/2010 |
| Q: You earned the following scores in science:75,82,90,84, and 71. You want to have an average score of ... A: a. Note that we would need (75+82+90+84+71+x)/6 >= 80. First, multiply both sides be 6, giving ... | |
| algebra problem | 12/22/2010 |
| Q: you have to spend $50 on pretzels and juice for a school function. a box of pretzels costs $2.75 and ... A: The equation would be 2.75x + 4y <= 50 where x is the number of boxes of pretzels and y is the ... | |
| Of "of" | 12/20/2010 |
| Q: I am looking for any articles on the uses of the preposition "of" in mathematics. I once read in a ... A: I'm not sure you wanted a reply or not, but here goes one for fun. Like, one for fun does rhyme in ... | |
| geometry | 12/16/2010 |
| Q: a rectangular prism has length l, width w, and height h. what is the length of the diagonal a to b ... A: The diagonal of a rectanglular prism is just like the diagonal of a triangle, only in 3 dimensions ... | |
| algebra | 12/13/2010 |
| Q: Having trouble figuring out problems that have something to do with the zero of the function. Here ... A: If the problem is f(x) = 16x - 4x, the x can factor out. That is, we have f(x) = (16-4)x, and since ... | |
| Check this problem | 12/13/2010 |
| Q: Please solve this system of linear equations. -4x-2y+z=-19 -6x+2y-6z=-8 -4x+2y-5z=-6 A: I get no solution since after reducing the 1st equation to x and eliminating it from rows 2 and 3 ... | |
| Polynomial Functions | 12/12/2010 |
| Q: How can you tell from the factored form of a polynomial function whether the function has a repeated ... A: Each factor of a polynomial indicates a place where the polynomial is 0. For example, f(x) = x² + x ... | |
| algebra 2 radicals | 12/11/2010 |
| Q: 1)divide and then simplify by taking roots, if possible. assume all expressions under radicals ... A: 1) Given this, √(2025xy)/(3√3), it is known that 2025 is 45², so this is ... | |
| f of g of x | 12/10/2010 |
| Q: given f(x)=4x+5 and g(x)= 4x-1, find (f of g)(x) A: Since f(x) = 4x + 5 and g(x) = 4x - 1, it is known that (f of g)(x) is f(g(x)). That is, take g(x), ... | |
| long division of polynomials. | 12/9/2010 |
| Q: using long division of polynomials, find the quotient and remainder when the first polynomial is ... A: This is really similar to long division, except that instead of multiples of 10 and positive values, ... | |
| Algerbra | 12/7/2010 |
| Q: I am having a difficult time solving this problem in my pre-calc class could you please help me.The ... A: The 6 point problems take 2 minutes, so that is 3 points per minute. The 10 point problems take 4 ... | |
| Extra Credit | 11/30/2010 |
| Q: I have an extra credit problem that I need help with. Here it is: If A*B means A-3B find the value ... A: This means that X*(2*X) is really ... lets break it down. Looking inside the parenthesis first, ... | |
| math4c | 11/21/2010 |
| Q: a hog raiser can sell 100 pigs of average weight of 80 kilos each at a profit of $1 per kilo if ... A: The price is $1 per kilo, and decreases by a penny for each week. Let n be the number of weeks, so ... | |
| math4c | 11/21/2010 |
| Q: a bus is chartered for a tour at a cost of $24000. when 4 additional people join the tour,the fare ... A: So there are n people, paying p each, and np = 24,000. If n+4 people ride, the price goes down by ... | |
| Algerbra | 11/20/2010 |
| Q: Find the intercepts for the graph of the equation 3x+y=-6 A: To find the intercepts, set each of the variables to 0. The x intercept is where y = 0. That is, 3x ... | |
| Algebra | 11/18/2010 |
| Q: A square photo graph of unknown dimensions (X by X) is to be place on a rectangular background that ... A: The picture is X by X. The background is 6 inches higher and 3 inches higher, so the area is ... | |
| Algebra | 11/17/2010 |
| Q: i know the answers to all of these problems, but i would like to know tips and tricks of how to get ... A: 1. For all nonzero r, t, and z values, 16r^3tz^5/−4rt^3z^2=? In this one, combine like terms ... | |
| algebra 1 | 11/16/2010 |
| Q: How do I solve the equation: 8x - 12 = -16 ? A: To solve this equation, the first thing that must be done is to isolate the x term by itself. Since ... | |
| trans to college math | 11/12/2010 |
| Q: y = 8/3x - 4 i gotta sketch the graph too A: The equation of a line is y = mx + b, where m is the slope and b is the intercept on the y axis. ... | |
| Help me . Sum of the (squared) roots | 11/12/2010 |
| Q: If the sum of the roots is : r + s = -b/a The equation is x^2-8x-3=0 What is r^2 + s^2 A: The two solutions of a quadratic equation of the from ax^2 + bx + c = 0 are (-b+sqrt(b^2-4ac))/(2a) ... | |
| Exponets | 11/11/2010 |
| Q: Evaluate x^2*x^n/x^3*x^-n A: It is known that 1/x^a is the same as x^-a and (x^a)(x^b) = x^(a+b). Using these and assuming the ... | |
| wheel revolutions formula | 11/6/2010 |
| Q: What is the formula to determine distance traveled, using the diameter of a wheel. A wheel with a ... A: The circumference c of a circle is 2*pi*r. Since d = 2*r, it is also d*pi. When n revolutions are ... | |
| Complex Fractions | 10/18/2010 |
| Q: in the equation: ((2/2+h) -1)/ h why is it that you can multiply the denominator by (2+h)/(2+h) in ... A: The fraction that is being looked at is [2/(2+h)]/h. Multiplying the denominator h by (2+h)/(2+h) ... | |
| Word Problems | 10/17/2010 |
| Q: You and your sister decide to combine your weekly overtime earnings to buy a birthday gift for your ... A: If your sister worked x hours of overtime, that would be 24x. Your total contributin would be ... | |
| solving equations | 10/16/2010 |
| Q: Ok this is a physics problem but solving it obviously requires algebra which I haven't taken in a ... A: I hit the wrong place and may have accidentally sent an answer before this one. Using the 3rd ... | |
| Identity in Algebra | 10/15/2010 |
| Q: 10x-35+3ax=5ax-7a What number(s) substituted for "a" makes this an identity? What and how? Thios ... A: Looking at the equation, divide it into x values and constant values. This gives 10x + 3ax = 5ax and ... | |
| math | 10/15/2010 |
| Q: Can you help me with this problem. 2(9n-1)+7(n+6)=-60 Thanks! A: The first thing to do is to multiply out the parenthesis. The 2(9n-1) = 2*9n - 2*1 = 18n - 2. The ... | |
| algebra 2 | 10/14/2010 |
| Q: i am having a lot of trouble with linear equations/models and then graphing them...can you be of ... A: On graph paper, the points are each (x,y) where x is the distance from on the x axis from x=0 and y ... | |
| math | 10/13/2010 |
| Q: How do you do this problem? 2v+18=16-4(v+7) Thanks! A: 1st, get rid of the parenthesis. Multiply the v by -4 and get -4v and multiply the -4 by 7 and get ... | |
| PREALGEBRA | 10/12/2010 |
| Q: M+2M+1=7 HOW DO I SOLVE A: Note that M + 2M is really 1M + 2M. This means our equation is really 1M + 2M + 1 = 7. Factoring ... | |
| College Algebra - 2nd year | 10/11/2010 |
| Q: Janet can shovel snow from her driveway in 30 minutes. Bill can do the same job in 55 minutes. How ... A: If the driveway is thought of a 1 unit, each minute Janet does 1/30 of the driveway and Bill does ... | |
| College Algebra - 2nd year | 10/10/2010 |
| Q: Find all number for which the rational expression is undefined. -9/17x A: At first I wondered if this was really -9/(17x) or -9x/17, but then I realized that x needs to ... | |
| how to do answer a 1 variable linear equation | 10/10/2010 |
| Q: is there an easier way to answer a 1 variable linear equation A: Lets say the variable is x. Get rid of any parnethesis by multiplying them by whatever factor is in ... | |
| algebra | 10/9/2010 |
| Q: 13=-t+5 4-(x-3)=1 5(a-4)+2=-8 is the answer -2 ? 6-2/3thirds(15x-9)=0 A: 13=-t+5 : For this one, subtract 5 from both sides. That gives 8 = -x. Next, multiply both sides by ... | |
| algebra | 10/8/2010 |
| Q: a=2 b=-3 c=-72 -4(-5-4)+9(-a+c)+-9(-9+b) A: Take a, b, and c and put them in the equation, then evaluate each set of parenthesis. To start ... | |
| algebra | 10/5/2010 |
| Q: if f(x)=x^2+7 then what is 3f(4)?? if f(x)=x^2+2x+1 then what is 2f(1)-3f(-1)? A: To answer, just put in the value that is in f(n) as x=n. For the 1st one, f(4) = 4^2 + 7. Now 4^2 ... | |
| Algebra | 10/5/2010 |
| Q: st + 3t = 6 for s Please help me solve these 2 equations thanks! f + 4 = 6 ... A: The 1st question is st + 3t = 6 and you are suppose to solve for s. When solving for s, put any ... | |
| Rational decimal to Fraction help | 10/3/2010 |
| Q: I'm in a college course called Mathematical Thinking and Writing, and right now we're discussing ... A: In finding the fraction, take the number of 9's to be how often it repeats. For example, with x = ... | |
| formula | 10/1/2010 |
| Q: if 79=50% and 69=20% and 83=30% what is the formual to find the total A: First, note that 50% + 20% + 30% = 1, so that is everything. Next, just multiply and add. Thus, it ... | |
| algebra | 10/1/2010 |
| Q: Althea paid $5.00 for two bracelets and later sold each for $15.00. She paid $8.00 each for three ... A: The 1st set of bracelets were at a profit of 15-5 per bracelet; there were two bracelets, so it is ... | |
| Introductory Algebra | 9/30/2010 |
| Q: The sum of three times a number and 7 more than the number is the same as the difference between ... A: This menas 3n + n+7 = -11-2n or 3n + n+7 = 2n+11. For the 1st case, the answer is found in 4n + 2n ... | |
| daughters math homework | 9/22/2010 |
| Q: daughter is in 6th grade.having trouble in math, algebra. doing function tables X = 2,5,8,12. y = ... A: The first three x values are 2, 5, 8 and the first three y values area 1, 7, 13. Notice that for ... | |
| graphing problem | 9/22/2010 |
| Q: while trying to sketch a graph for Y=sgrt16-xsq. Icame up withx=+/- (4,0)and (y=+/- (4,0). The ... A: When y = √(16-x²), the squareroot is always assumed to be positive. That is why in the ... | |
| Algebra 2 | 9/20/2010 |
| Q: Assume that each situation can be described by a linear function. It costs Ace Electronics Company ... A: This means if we take $2200 - $1900 = $300, that is the price of 16-10=6 VCRs. That means each VCR ... | |
| Extraneous Solution | 9/19/2010 |
| Q: What is the difference between a wrong answer and an extraneous solution? What algebraic procedure ... A: An extraneous answer is one that pops up but isn't really the answer. For example, if a triangle ... | |
| Algebra,Imaginary Numbers | 9/18/2010 |
| Q: Sir, I have a few question regarding algebra imaginary numbers. 1.)find the modules of: ... A: 1.)find the modules of: (2+√-3)^2 The square is 2 + 2√-3 - 3 = -1 + 2√-3; I'm not ... | |
| Algebra,Imaginary Numbers | 9/18/2010 |
| Q: Sir, I have a question related to algebra imaginary numbers. 1.)Show that ... A: 1. Note that powers on complex numbers can be easily done using polar coordinates. That is, given ... | |
| Homework | 9/17/2010 |
| Q: I'm so confused!!! I'm taking high school algerbra in 8th grade and there is this question on my ... A: The standard deviation is only an estimate. For example, the height of men is 5'10" with a standard ... | |
| Math help! | 9/16/2010 |
| Q: We cannot figure out this problem.. 12-x divided by 2 + 3 = 1 can you help me? Thanks soo much!! ... A: The problem is (12-x)/(2+3) = 1. Now 2+3 is 5, so lets multiply both sides by 5. On the left the ... | |
| algebra | 9/15/2010 |
| Q: Solve the equation for x. arccos x = arcsec x A: This is the same as saying cos(arccos x) = cos(arcsec x). That can be seen to be x = cos(arcsec x). ... | |
| algebra | 9/15/2010 |
| Q: Two hot dogs and a soda cost $3.25. If three hot dogs and a soda cost $4.50, what is the cost of ... A: Get a sheet of x-y paper. Make D on x and S on y. Draw the lines 2D + S = 3.25, noting it cross ... | |
| linear function word problem | 9/14/2010 |
| Q: A plumber charged $110 for a three hour job and $160 for a five hour job. At this rate, how much ... A: The costs are 110 for 3 hours and 160 for 5 hours. If the difference in money is looked at, that is ... | |
| Im Stuck... | 9/14/2010 |
| Q: How would you use the distributive property to simplify? e.g. 9x28,7(2,009),30x105,7x10+7(-3),6(8) + ... A: To use the distributive property means to divide one of the numbers into parts. For example, in ... | |
| algebra | 9/13/2010 |
| Q: Two hot dogs and a soda cost $3.25. If three hot dogs and a soda cost $4.50, what is the cost of ... A: This gives rise to two equations. The 1st is 2D + S = 3.25 and the 2nd is 3D + S = 4.5. The ... | |
| sets and domains | 9/13/2010 |
| Q: a. Graph the solution set on a number line. b. tell whether the interval graphed is open,closed,or ... A: Make a number line an label the distance from the left edge 1, 2, 3, 4, 5, 6, 7, 8, 9, and 10. Put ... | |
| algebra | 9/12/2010 |
| Q: while trying to sketch a graph for Y=sgrt16-xsq. Icame up withx=+/- (4,0)and (y=+/- (4,0). The ... A: That looks like the function y = √(16-x²). If that is the function, you are right. If we put ... | |
| algebra1 | 9/12/2010 |
| Q: What is perimeter.expressions. A: The perimeter is the length of the outside. For a triangle, it is the sum of the length of the ... | |
| Algebra word problems | 9/9/2010 |
| Q: A hamburger costs 30 cents more than a hot dog and 20 cents less than a cheeseburger. If 3 ... A: Let x = hamburger price, y = hot dog price, and z = cheeseburger price. We are given that x = y + ... | |
| Math | 9/8/2010 |
| Q: (-1)+2+(-3)-(-2) A: This is the same as -1 + 2 -3 - -2. Note that minus a minus is a plus, so this is -1 + 2 - 3 + 2. ... | |
| numerical relationships | 9/7/2010 |
| Q: 2,11: 4,67: 5,128: 3, ? Please can you tell me what is the relationship between each set of ... A: I created a difference table in Excel. That is, 2 11 3 0 -11 4 67 67 78 5 128 61 -6 -84 Note ... | |
| 2-step equation | 9/5/2010 |
| Q: Sasha researched the size of 2 zoos. The zoo in the north is almost twice as large as the zoo in ... A: If the South zoo has 200 fewer than twice the number in the North, let x be in the north. The ... | |
| Algebra | 9/3/2010 |
| Q: 9 – 6g= f -6g + 3f=15 A: Take f = 9 - 6g and put that into the 2nd equation. Since it is a 3f in the 2nd equation, that would ... | |
| Undefined Correlation | 9/1/2010 |
| Q: Could you please give me an example of a situation in which the correlation of two sets of data is ... A: An undefined correlation is one in which the data would plot with points making a vertical line. ... | |
| Algebra | 8/5/2010 |
| Q: When solving a radical equation, how do we use the principle of powers to eliminate radicals? A: Radicals and powers are inverses of each other. This is because nth root of a x is x^(1/n) and when ... | |
| Algebra | 8/3/2010 |
| Q: Determine whether the variation model is of the form y = kx or y = k/x. I'm not sure about this one ... A: In the first paragraph, I showed what it was y = kx. We just had to group the x's and y's together, ... | |
| Algebra 2 help | 8/2/2010 |
| Q: 22. Determine the quadratic equation for the parabola: maximum value: 6; x-intercepts: -2 and 4 ... A: 22. This says that we must have A(x+2)(x-4). The average is at (-2+4)/2= 1. We can put 1 in for x ... | |
| Algebra | 8/2/2010 |
| Q: Determine whether the variation model is of the form y = kx or y = k/x. I'm not sure about this one ... A: Look at both functions. For the 1st one, y = kx, we can divide both sides by x, giving y/x = k. For ... | |
| algebra | 7/30/2010 |
| Q: 1.The magnitude and direction of vectors u and v are given.Find vector w's polar coordinates. u: ... A: It is known with polar coordinates (r,Θ), rectangular coordinates (x,y) can be found by x = ... | |
| Algebra | 7/29/2010 |
| Q: s4 4)Determine the vertex coordinates for: g(x) = (6 + x)(4 + x) 12)Determine the range for: (x) ... A: Determine the vertex coordinates for: g(x) = (6 + x)(4 + x) The vertex would be halfway in between ... | |
| magnitude word problem | 7/28/2010 |
| Q: Three forces of magnitudes of 250 lbs 60 degrees N of W, and 200 lbs S act on an object.Find the ... A: For the force that is 60° N of W, take 1/2 of the force to the west and 0.866 of the force to the ... | |
| Intermediate Algebra | 7/27/2010 |
| Q: 4-i _____ = 5+i A: Multiply the top and bottom by the conjugate of the bottom. That is, multiply by (5-i)/(5-i). For ... | |
| Algebra help | 7/26/2010 |
| Q: PART 6 1) Simplify. (z^3-4z)/(z^2-4z+4) a)z b)z/4 c)z(z+2)/z-2 d)z^2+2z/2 2)(a-x)^2/x^2-a^2 a)1 ... A: 1) Factor out a z on the top. Note that what is left on top is the difference of squares and the ... | |
| Algebra Q | 7/25/2010 |
| Q: If a + 2*b = 5, show that:- cube of a + 8*cube of b + 30*a*b = 125 A: It is known the 125 = 5*5*5 = 5³. This means we need to show that (a+2b)³ = a³ + 8b³ + 30ab. Now it ... | |
| Algebra Questions | 7/24/2010 |
| Q: Hey, I was doing practice problems and kinda got stuck on a few. Could you please help me, thanks! ... A: In terms of a fuction of y in terms of x, it is neither since it is not defined for negative x. It ... | |
| Algebra Questions | 7/22/2010 |
| Q: Hey, I was doing practice problems and kinda got stuck on a few. Could you please help me, thanks! ... A: 1. I see no function, only an equation with a solution for x. Addding 5 to both sides gives ... | |
| lets see if you got the same answers I did | 7/22/2010 |
| Q: √= root 1) (x^2 - x + 3)/(x+1) 9) (x^6-1)/(x+1) 21)2x^4 - 5x^3 - 11x^2 + 20x + 12; -2, 3 ... A: Since the answer you get might be these answers, I bet we got the same ones. Still, check them to ... | |
| Interpreting a Function’s Graph | 7/19/2010 |
| Q: I have attatched a graph for the questions. Please help me. Given the information on the graph, ... A: I can give you some good hints. It is a function because for each x defined, there is only one y. ... | |
| algebra point-slope | 7/18/2010 |
| Q: I have a question that has been kicking my butt. The quetsion is b) The slope is -2/3 and has the ... A: The equation of a line is y = mx + b where m is the slope and b is the y-intercept. This means that ... | |
| Simplifying complex fractions | 7/18/2010 |
| Q: 5(xneg1power) -2(yneg1power) divided by 25(xneg2power) - 4(yneg2power)... At the end when cross ... A: It is known that a(negbpower) = a^(-b) = 1/a^b. Using this ican be seen that 5(xneg1power) = 5/x, ... | |
| Work proportion questions | 7/17/2010 |
| Q: It takes a worker 3 hours to do a job. With a partner it takes 1 and a half hours. How long for the ... A: With two of them, the time is cut in half, so the other must work at the same rate, so yes, the ... | |
| algebra 2 | 7/17/2010 |
| Q: 9. If Steven can mix 20 drinks in 5 minutes, Sue can mix 20 drinks in 10 minutes, and Jack can mix ... A: Steven can mix a drink in 20/5 = 4 minutes. Sue can mix a drink in 20/10 = 2 minutes. Jack can mix a ... | |
| help! | 7/16/2010 |
| Q: y=2xsuared2 +5 A: Is that y - 2xsquared + 5? That is, y = 2x^2 + 5, which is 2x² + 5? What's the question (what are ... | |
| solution of quadratic equation by completing square | 7/15/2010 |
| Q: Kindly solve the quadratic equation by completing square A: Divide both sides by -3 to get a 1 in front of the s². This gives s² + s/3 - 1/3 = 0. Divide 1/3 ... | |
| Brain melt down | 7/14/2010 |
| Q: Is it normal/common for a top math student to get a brain overload, blank out and just bomb on a ... A: It happens to me. Sometimes I look at a problem for quite awhile before I think, "Oh yeah... of ... | |
| grouping polynomials to factored form. | 7/13/2010 |
| Q: When grouping polynomials (trinomials) into binomials I undestand the process but I spend way to ... A: I have found no way to do it simply. For this problem, 2x² + 13x - 7, know the factors of the 1st ... | |
| Systems of equations | 7/13/2010 |
| Q: I am really having a hard time in my algebra class- I have tried to read the text but it might as ... A: Graphing lets the solution be visualized and has the fewest errors. The problem is it can be done ... | |
| Trig | 7/12/2010 |
| Q: determine the amplitude, period, and phase shift of each function y= -3 cos(2x -[pi] /2) A: Given that function y = Acos(Bx+C), the amplitude is max-min=A-(-A)=2A, the period is how far from 0 ... | |
| linear functions | 7/11/2010 |
| Q: taxicab fare is 30.00 for the first 500 m and 1.00 for every additional 500m express the fare as a ... A: So that total fare is found by knowing that it is 30 for the first 500m and 1 for each additional ... | |
| solving systems | 7/11/2010 |
| Q: Mr. Scott A Wilson, I am having trouble figuring out how to solve these systems. The examples in my ... A: 1) The equations are 5x-2y=-24 and -4y=-48-10x. Now since the 1st equation has a -2y and we are ... | |
| algebra | 7/9/2010 |
| Q: Which of the following describes the line containing the points(3,12) and (9,9)? A.) y = -0.5x + ... A: Go down the list and put in 3 for x until 12 is gotten for y. For A, -1.5 + 12 = 1-/5; that's not ... | |
| Compound Interest Calculation | 7/7/2010 |
| Q: I want to determine the expanded form for the following: P(1 + r)^3 I think that the answer is as ... A: The beest way to do it is to leave the P out front until done, so ignore how you aproached it for ... | |
| Algebra | 7/6/2010 |
| Q: I have a few questions that I need help with 1. A plane goes from A to B against the wind in 4hrs ... A: 1. If it goes 4 hours, 30 minutes, then that is the same as 270 minutes. If it goes 3 hours, 40 ... | |
| Need the steps | 7/3/2010 |
| Q: I know from trail and error that x = 3 in the following equation: (x+1)/(2^x) = 1/2 I tried to ... A: I don't know of how to solve it the way it is with basic math, however... If the equation (x+1)/2^x ... | |
| Algebraic | 7/2/2010 |
| Q: Hey I'm unclear about a few problems I have, I hope you can help: 1. Translate into an algebraic ... A: 1. Given the cost is C and the units are x, the equation would be C = $3200 + $80x. 2. At x = 4, y ... | |
| algebra | 7/1/2010 |
| Q: A dish of lasagna baked at 375°F is taken out of the oven into a kitchen that is 74°F. After 6 ... A: The temperature when taken out was 375°F and the current temperature is 319.5°F. When the difference ... | |
| Algebra courses | 6/30/2010 |
| Q: I'm just curious, for beginning/intermediate algebra which areas do they seem to have the most ... A: Equalities When x is 4, that is the same as saying x = 4. Multiplying When you see 4x, that ... | |
| Radicals | 6/23/2010 |
| Q: Many people know that the weight of an object varies on different planets, but did you know that the ... A: a. Solving w = C/r² for r gives r² = C/w, so r = √(C/w). b. If w=100 and r=3963, then the ... | |
| coordinate geometry | 6/22/2010 |
| Q: Which group of points are all on the line y =.5x + 6? A:(–2, 5); (2, 5); (4, 4) B:(–2, 5); (2, 7); ... A: Looking at the answer, I would compute 0.5x + 6 for x equal to -2, 2, and 4. That looks like it ... | |
| Factoring Polynomials | 6/21/2010 |
| Q: I have absolutley no clue as to what I'm doing. I have to do step by step factoring for the ... A: A common polynomial is a² - b². This is the same as (a-b)(a+b) since that is a²+ab-ab-b², and the ... | |
| Factoring Polynomials | 6/21/2010 |
| Q: There are 4 questions that need to be factored step by step and I only have the first one done.(I ... A: For all of the problems, actor a² - b², the answer is (a+b)(a-b). 1. Yes, it is correct. 2 Rewrite ... | |
| algebra isoceles triangle | 6/18/2010 |
| Q: determine the angles of an isoceles triangle if double the sum of the two equeal angles is equal to ... A: The angles of a triangle are A, B, and C. It is knowm that A+B+C=180°. The problem states that ... | |
| algebra- solve equation | 6/17/2010 |
| Q: i need help with the following 7x - 2 = 6x + 4 4x + 7 + 3x = 5x + 13 + x 2/3 x =6 4x - 2 + 7 = ... A: 7x - 2 = 6x + 4 Add 2-6x to both sides. 7x - 2 + 2 - 6x turns into x since -2+2 = 0 and 7x-6x=1x=x. ... | |
| Factoring Polynomials | 6/16/2010 |
| Q: I need all the help I can get on factoring polynomials. I need step by step instructions please. ... A: 1. That is 3² - x². WHen there is a difference of squares a² - b², the answer is always (a-b)(a+b). ... | |
| How do I solve? | 6/15/2010 |
| Q: -x=y+2 ???? A: To solve this equation for x, multiply both sides by a negative. That gives x = -y-2. To solve this ... | |
| Quadratic equations | 6/13/2010 |
| Q: I just don't understand I keep gtting stuck I just want to get it right, but it has been difficult ... A: A.Does the graph of this equation open up or down? How did you determine this? The equation is of ... | |
| math | 6/13/2010 |
| Q: (67^67 +67)/68 [that is 67 raised to the power 67 plus 67 divided by 68]...then remainder will be Pz ... A: Now if we look at 2^2/3, that is 4/3, R=1. If we look at 3^3/4, that is 27/4, R=3. If we look at ... | |
| i need help | 6/11/2010 |
| Q: Twice one number is 20 more than a second number. One-fourth of the first number is 2 less than 0.25 ... A: Call the two numbers s and t. The 1st statement says that 2s = t + 20. The 2nd statements says that ... | |
| Algebra 1 | 6/11/2010 |
| Q: Im trying to solve for y. x-1/2y=6 I got stuck when I simplified down to -1/2y=-1x+6 What did I do ... A: Is the equation really x - y/2 = 6? I prefer writing the denominator after each term. In this way, ... | |
| symbol ! | 6/8/2010 |
| Q: if I have the problem 7! / {2!*(3+4)!} , how do I simplify or solve it? A: Now it could be said that 2! = 2, 3! = 3*2! = 6, 4! = 4*3!=24, 5! = 5*4! = 120, 6! = 6*5!= 720, and ... | |
| algebra | 6/7/2010 |
| Q: Find five ordered pairs to the equation y=4x+1. Then determine its graph. Can not figure this out, I ... A: Take any five values for x. I will use higher values, but lower one should be picked. Suppose x = ... | |
| math | 6/7/2010 |
| Q: if( 67 raised to power 67 +67) is divided by 68, then remainder is A: Take two simpler numbers, like 2 and 2+1=3. If we take (2^2 + 2)/3, that is seen to be 6/3, so the ... | |
| PLEASE HELP SOON | 6/6/2010 |
| Q: A manufacturer of bird feeders cuts spacers from a tube that is 13 1/3 (mixed fraction) inches ... A: It looks like a rough estimate would be somewhat over 13, since each spacer takes less than an inch ... | |
| algebra | 6/5/2010 |
| Q: When Millie called Pete’s Plumbing, Pete worked 2 hours and charged her $70. When her neighbor ... A: The difference in money can be found to be $170 - $70 = $100. The difference in hours can be found ... | |
| Help! More Word Problems | 6/5/2010 |
| Q: 1. The recipe for a loafcake calls for 3/4 pound of jellybeans in assorted colors. If 20 cakes are ... A: 1. Multiply the amount of jelly beans needed for each cake by the number of cakes. Thus, it is (3/4) ... | |
| Quadratic equations | 6/3/2010 |
| Q: If you are looking at a graph of quadratic equations, how do you determine where the solutions are? A: If the quadratic factors into y = (x-a)(x-b), the solutions are a and b. The good old quadratic ... | |
| Rational functions | 6/3/2010 |
| Q: What are the limitations on domain in the graph of rational functions? A: The domain of a function y = f(x) are all the possible choices for x. The values of x that can't ... | |
| word problems | 5/30/2010 |
| Q: Same problem...working on them for 5 weeks so confused. please help...again lol. 1. The length of a ... A: 1. The length of a rectangular boat shed must be 4 meters more than the width, and the perimeter ... | |
| number lines?! | 5/29/2010 |
| Q: I have been working on these questions for 5 weeks and I am no where near getting them right. Solve ... A: 1. 4x + 13 = 41 Subtract 13 from both sides. This gives 4x < 28. Divide both sides by 4, given x < ... | |
| algebra 2 trig | 5/27/2010 |
| Q: Why is the domain in a function always all real numbers? A: The domain of a function is all the values of x that can be put in the function. The domain of all ... | |
| Mixed review find the value of y | 5/26/2010 |
| Q: 2 y/2 - 2/3 = 1 5/6 A: That looks like it is the same as (4+y)/2 - 2/3 = 11/6 since 2 = 4/2 and 1 = 6/6. Multiply the whole ... | |
| Algebra | 5/25/2010 |
| Q: How do you find the solution of the system 3x-y=7 4x+y=7 can you show me in every way please and ... A: Add the two equation together. This will give 3x - y + 4x + y = 7 + 7. On the left side, put like ... | |
| algrebra | 5/25/2010 |
| Q: 3. Simplify (2x + 3)(x − 4) = ? A. 2x 2 + 5x − 12 C. 2x2 − 5x + 12 B. 2x2 ... A: To do it right, split apart the problem into 2x(x-4) and 3(x-4). Given that, we can then split ... | |
| Algebra 2 | 5/22/2010 |
| Q: 1.) Find a formula for the nth term of the geometric sequence: 500, 100, 20, 4, ... 2.) Find a ... A: This will say how to answer each question. 1.) Each term is the last one divided by 5; 500/5=10; ... | |
| FUNCTIONS | 5/21/2010 |
| Q: what happens if n in a function is odd and when n is even? A: When the function is odd, the direction it goes when the function goes to ±infinity is positve in ... | |
| Math | 5/21/2010 |
| Q: How do i find the roots of: x^2-8x-12 x^3=2x^2-5x-6 x^4-x^2-20 A: If the 1st werex² - 8x + 12 = 0, it would factor to (x-2)(x-6) = 0 and the roots would be seen. ... | |
| algebra | 5/20/2010 |
| Q: square root method. 3(x+2)^2-7=0 A: I'm not familiar with what is called the "square root method", but this looks like it. Take 3(x+2)² ... | |
| Clock Problems | 5/19/2010 |
| Q: 1) At what time between 2 and 3 o'clock are the hands of the clock be 15 minutes apart? 2) At ... A: 1) The position of the hour hand at this point... Well, there are 60 minutes in an hour, and that ... | |
| Algebra | 5/14/2010 |
| Q: Please solve: x squared +4x-7=0. Also, 7x squared-28=0. A: To solve x² + 4x - 7 = 0, start with a=1, b=4, and c=-7. Then use the quadratic formula; ... | |
| solid | 5/14/2010 |
| Q: A circular pool is 8 feet across. If the pool holds 48pift3. How deep is the pool? Use volume ... A: The area of the bottom is B = πr² ft³, where r is half of the diameter. The diameter is 8. The ... | |
| Algebra & Geometry | 5/13/2010 |
| Q: I cannot solve for x intercept in the equation y=(-1/2)x^2 +2x+10 A: To find the x intercepts, think of the parabola as ax² + bx + c. The solutions are (-b ± ... | |
| algebra | 5/13/2010 |
| Q: 7x-4y=-3 x+2y=3 work by addition method A: The two equations are (#1) 7x-4y=-3 and (#2) x+2y=4. To do the addition method is to add multiples ... | |
| difference quotients | 5/11/2010 |
| Q: The question is: for the function f(x)=2-x^2, construct and simplify the difference quotient f(x + ... A: It means to find what f(x+h) is, which is f(x+h) = 2 - (x+h)², subtract f(x) from that, and divide ... | |
| algebra | 5/10/2010 |
| Q: 2g squared + 24g + 72 = 2x to the 3rd power -18x = A: The 1st equation is 2g² + 24g + 72, which is 2(g²+12g+36) This is in the form 2(g² + 2bg + b²), ... | |
| hi | 5/8/2010 |
| Q: If a plane can fly with the wind 3360 miles in 7 hours and make the return flight against the wind ... A: It is known that d = rt, where d = distance, r = rate, and t = time. We know that distance is 3360. ... | |
| question | 5/7/2010 |
| Q: Dutch elm disease is a fungal disease that kills elm trees. It is spread by certain species of bark ... A: (a) Since there are 8000 trees and 20% chance of being infected, the number of healthy trees would ... | |
| How To Solve | 5/6/2010 |
| Q: I need to make a table of values and graph the following: y=3x^2 Can you show me the steps on how ... A: Take x = 1, 2, 3, 4, 5, 5, 6, 7, 8, 9, and 10. Now since there is an x² in there, square each of ... | |
| equation with expalination | 5/3/2010 |
| Q: the employees in a certain factory are divided into three wages classification. one group is paid at ... A: Let there be n people in the 1st group, making 0.25 Rs/day. This means that there are 2n in the 2nd ... | |
| question | 5/1/2010 |
| Q: Pretend that you are a technical consultant. A representative of a Pacific island nation comes to ... A: Since it is 2010 now, the test was done 50 years ago. Looking in http://en.wikipedia.org/wiki/Cobalt ... | |
| Algebra Fractions | 4/30/2010 |
| Q: Please help me! 1) Reduce the fraction -20t^5 u^2 v^3 over 48t^7 u^4 v 2) Reduce the fraction ... A: 1) Reduce (-20t^5 u^2 v^3)/(48t^7 u^4 v). It is known that -20/48 = -5/12, t^5/t^7 = 1/t^2, u^2/u^4 ... | |
| Algebra 2 | 4/28/2010 |
| Q: Paul can address 75envelopes in 1 hour, but ann can do the same number in half an hour. Working ... A: Since Ann works twice as fast, she can address 150 envelops in an hour. Between them, that is ... | |
| Algebra II | 4/28/2010 |
| Q: Find the measure of an angle between 0° and 360° that satisfies the condition: cos θ = 0.7815, ... A: The numbers were put in Excel, then they were cut from there and pasted here. That is why there are ... | |
| algebra. factoring the trinomial. | 4/27/2010 |
| Q: my name is Nicholas and i was wondering if you could help me with a math problem? i was wondering ... A: The problem is written as 8x + 24x + 3, and that is (8+24)x + 3, which is 32x +3. If trinomial ... | |
| Algebra 1 | 4/27/2010 |
| Q: Iam completly stuck on this question! I could use help before I go crazy! the question says: " A ... A: I will take the speed of the Boat as B. I will take the speed of the Current at C. We know that ... | |
| Algebraic Expression | 4/26/2010 |
| Q: How do I factorize 2y²-7y+6? Thank you. A: Note that 2 = 1*2 and note that 6 = 1*6 or 6 = 2*3. If 1,6 is tried, the middle would be -1*1 - 2*6 ... | |
| question | 4/26/2010 |
| Q: • The island’s government plans to seek damages proportional to the expected number of cancer cases ... A: In 1960, the population was 4,200. In 2010, the population is 14,300. The value of p, the increase ... | |
| algebra | 4/25/2010 |
| Q: can you help me find the slope of a line that is perpendicular to a line that passes through (6/1/2) ... A: I take it the points are (6,1/2) and (5,7/2). Treat these as (x1,y1) and (x2,y2). The slope is ... | |
| Distributive Property to factor polynomials... | 4/24/2010 |
| Q: .I was out of school for a couple of days and when I came back, I thought that I could catch up ... A: In this list, I believe they want the commomn factors taken out. Thus, 10a^2+40a = 10a*a + 10a*4 = ... | |
| algebra | 4/23/2010 |
| Q: 28x divided by 7x = ? don't have a calculator that can help my son with question?can you help me and ... A: With 28x/(7x), the x's cancels, so all that is left is 28/7. It can be seen that 7/7=1, (7+7)/7 = ... | |
| numerical math | 4/22/2010 |
| Q: convert 15 centigrams to milligrams A: There are 100 centicgrams in a gram. There are 1000 milligrams in a gram. This means the deciam ... | |
| 2 SAT math problems | 4/21/2010 |
| Q: I have 2 questions I just can't figure out. I hope you don't mind that I'm asking more than one and ... A: Note today, since I only have 3 other people with questions. Q1. It is known that 18√18 = ... | |
| solving problems with two variables | 4/20/2010 |
| Q: I can solve this problem on my own however, I can't put it into a formula format... Timmy has 180 ... A: Yes, that is correct. He has 74 color marbles and 106 plain marbles. It could also be done with ... | |
| algebra | 4/20/2010 |
| Q: 1. a=1/2h(b-a) solve for b Thank you A: Is that suppose to be a = (1/2)h(b-a), which is a = h(b-a)/2? That is my guess, but I'll solve again ... | |
| grade | 4/19/2010 |
| Q: I currently have 81 percent in a course I am taking, this mark is worth 60 percent of my grade. I ... A: Well, 60% is 0.6, and 0.6*81 = 0.486. To get a 0.65 if you have 0.486 already requires 0.164 more. ... | |
| solving with variables | 4/18/2010 |
| Q: 1/3s + 7/9 = 4/3s A: The equation must be s/3 + 7/9 = 4s/3, right? Multiply each term in the equation by 9. This gives ... | |
| finding the slope | 4/18/2010 |
| Q: Slope= -5, passing through (-4,-2) Slope = –2, passing through (0, –3) really do not understand how ... A: Find the line using the point-slope equation. The point-slope equation is y - y0 = m(x - x0) where ... | |
| function table | 4/16/2010 |
| Q: I need the rule for the following function table: X = 1 Y = -1 X = 2 Y = 1 X = 3 Y = 3 X ... A: Each time X increases by 1, Y increase by 2. That gives us X = 2Y to start with. From this ... | |
| algebra | 4/15/2010 |
| Q: solve each equation using the quadratic formula. please show work X² - 7 + 12 = 0 X² + 5 + 6 = 0 ... A: The quadratic formula is x = (-b±√(b²-4ac))/(2a). Since we are using the quadratic formula, I ... | |
| Algebra | 4/15/2010 |
| Q: How do I rewrite using exponential notation? I need to assume that even roots are of nonnegative ... A: If I read it correctly, since the cube root is the same as to the 1/3, this looks like ... | |
| Linear model | 4/14/2010 |
| Q: What does a linear model look like? Can you show me how to do one for math? A: A linear model is where one variable is dependent on the other variable in a linear equation. The ... | |
| algebra | 4/12/2010 |
| Q: how do you graph a y-intercept when it is a fraction. For example, y=3x+1/3 how would i graph ... A: Take graph paper and call each square on the paper 1/3 x 1/3. This would mean that 1x1 would be 3 ... | |
| Algebra | 4/11/2010 |
| Q: How do you solve this problem? Solve using the five-step problem-solving process. The houses on ... A: The problem reads that the addresses are two consecutive odd numbers. This means that if one is x, ... | |
| absolute value | 4/10/2010 |
| Q: In what way is an absolute value function connected to the real world??? A: In physics, when a ball bounces, the height is an absolute value, since the ball is always above the ... | |
| Managerial Economics | 4/9/2010 |
| Q: 3. From the demand function P = 200 – 0.25Q or Q = 800 – 4P. Calculate point price elasticities at ... A: First note that both equations are the same; one is solve for P and the other for Q. The elasticity ... | |
| math help needed | 4/6/2010 |
| Q: 1. simplify: The square root of 3 to the square root of 2 power times the square root of 3 to the ... A: 1. simplify: The square root of 3 to the square root of 2 power times the square root of 3 to the ... | |
| Math help needed | 4/4/2010 |
| Q: 1. Find and equation of the ellipse having the given points as foci and the given sum of the foci ... A: 1. Find and equation of the ellipse having the given points as foci and the given sum of the foci ... | |
| Complex Zeros | 4/4/2010 |
| Q: Find all the complex zeros of the polynomial: p(x)=x^3-7x+36 A: Note p(-1) = 42, p(-2) = 42, p(-3) = 30, p(-4) = 0 - aha! I found it. SO, p(x) = (x+4)(x²-4x+9)- go ... | |
| algebra | 4/3/2010 |
| Q: write each equation in standard form using only integers and a positive co-efficient please show ... A: These are questions on the basic line equation, which is y = mx + b. The value of m is the slope and ... | |
| pre-algebra | 3/31/2010 |
| Q: An amusement park's average daily attendance during its first year of operation in 1988 was 2046 ... A: If the attendance has increased by 115 per year, take the number of years * 115 + starting amount to ... | |
| solve for x | 3/30/2010 |
| Q: (x+1)/x = -7/(x-12) A: Take (x+1)/x = -7/(x-12) and multiply both sides by x(x-12). This gives (x+1)(x-12) = -7x. Multiply ... | |
| alegbra | 3/28/2010 |
| Q: solve what is if 5/(4--1)+(4/2)+6x A: Well, the first terms has a 4--1, is 4+1, which is 5. Thus, we can say that 5/(4--1) is 5/5, which ... | |
| Problem solving | 3/28/2010 |
| Q: an eight-year-old boy named Nathan wants to compare his age with that of his mother and grandfather. ... A: 1. What to underline would be "eight-year-old boy", "mother is exactly four times his age ", ... | |
| Algebra 2 and Trig adv | 3/22/2010 |
| Q: z^2 - 15z/8 - 1/4 = 0 A: Multiply the whole equation by 8 to get rid of fractions. This gives 8z² - 15z - 2 = 0. Since 2*8 = ... | |
| rational expressions | 3/21/2010 |
| Q: Please help me. I have been out of school for 10 year and am now in college algebra. I don't have a ... A: The first thing that I'd do is get rid of the fractions. On the 1st problem, there is a 2 and a 5 in ... | |
| Algebra help! Please! | 3/20/2010 |
| Q: These challange me for some reason :( Please help! 1. Find the min/max and vertex of the function ... A: 1. Find the min/max and vertex of the function g(x) = 2x² + 8x. This function has g'(x) = 2x + 8, ... | |
| Practical uses of Hyperbolas | 3/20/2010 |
| Q: My Algebra 2 class has just finished the "conic" section in our books. I've asked myself numerous ... A: Two place I know of are as follows. The first one is in the study of waves. When only 1 stone is ... | |
| Please help! I am so confused!! | 3/19/2010 |
| Q: 1. Simplify (√6)/ √2 + √3 a)1 b)(2√3 - 3√2) c)(6√2 -√3) ... A: 1. Simplify (√6)/ √2 + √3 Note that the first one has √'s in the top and ... | |
| Difficulty solving any kind of algebra story problem | 3/18/2010 |
| Q: I'm 13 years old, in 8th grade. I'm homeschooled (though I'll be going to high school next year). I ... A: The problem states that it is $3 for each book with a $5 constant. This means it is 3b + 5. Since ... | |
| maths | 3/17/2010 |
| Q: i was wondering if U could help me with this one question. d² + d² . i just don't get it. Please ... A: d² + d² means "d squared + d squared". This means if d is 1, then 1² + 1² = 1 + 1 = 2. If d = 2, ... | |
| Math | 3/15/2010 |
| Q: Graph x= -y^2 I'm confused on how to get the set or pair to graph, since I can find the vertex for ... A: The value of x is the position on the horizontal assymptote and the value of y is the position on ... | |
| mathh | 3/15/2010 |
| Q: i need to change this to logarithmic form: ^3 sqrt (64)= 4 A: Is that suppose to be the cuberoot(64) = 4? This can also be written as 64^(1/3) = 4. The log(64) ... | |
| cant remember how to do this type of equation | 3/14/2010 |
| Q: The question out of the book is.. The perimeter of a triangle is 51cm. The longest side is twice ... A: Any triangle has three sides, A, B, and C. They are labeled so that A is the longest, B is the ... | |
| unitary method | 3/13/2010 |
| Q: If seven girls can plant 154 trees in a day. How many trees could fourteen girls plant in a day? A: Note that 7 girls plant 154 trees a day. Also note that 14 girls = 2*7 girls. This means that 14 ... | |
| I Need Help In An Equation- 7th Grade | 3/11/2010 |
| Q: This equation totally confuses me: 5t-2(t-3)=33 I can't figure it out, although all the other ... A: When I see 5t - 2(t-3) = 33, I immediately know that the () need to be dropped. That is, -2*t is -2t ... | |
| Algebra College math 209 | 3/10/2010 |
| Q: How do you determine the common factors in an expression? A: The common factors are the factors in each term. On the PC, a^b is used for (a to the b). If the ... | |
| algebra 1 - word problem | 3/10/2010 |
| Q: one train leaves a station heading west. 2 hours later a second train leaves the same station ... A: Since it is 6 hours after the second train left, and it left 2 hours after the first train, the ... | |
| geometry | 3/9/2010 |
| Q: 125 small congruent cubes are combined to build a large cube. all the faces of the large cube are ... A: To have 125 smaller cubes, it is known that 125 = 5³, so the cube is 5x5x5. With this, we know that ... | |
| Mathematics -- Algebra | 3/5/2010 |
| Q: If an element or two from the set A are not paired with any element of set B, then is the domain of ... A: The domain of the function is which variables the function acts upon. In this case, the domain of R ... | |
| exponents outside of parenthesis | 3/5/2010 |
| Q: I have 3 questions. Here they are: 1.a^m * a^2 2. y^a * y^a+2 3. (3x)^2 Thank you for your help. A: It is known that 2^3 = 2*2*2 = 8. It is known that 2^5 = 2*2*2*2 = 32. It is alson known that 8*32 = ... | |
| Mathematics -- Algebra | 3/4/2010 |
| Q: If an element or two from the set A are not paired with any element of set B, then is the domain of ... A: I will assume that A has the domain and B has the range. If not every element in A maps into B, ... | |
| Reworking an equation | 3/3/2010 |
| Q: I'm trying to rework the following equation to get A=. can you help? X = ... A: X = ((((A+1.99)/1.175)-(((A*15/100)+0.25))-(B+C)) This is the same as X = (A+1.99)/1.175 - A*0.15 + ... | |
| Alebra | 3/2/2010 |
| Q: How we can solve a cubic equation whose coefficients are lengthy trigonometric functions?(using some ... A: I would use Excel. Note that it defines sin(), cos(), and tan(). Also note that sec() = 1/cos(), ... | |
| ♥ hai♥ | 2/28/2010 |
| Q: can you give me 5 ex. of indirect proportion? A: You only asked for five, but I through in a few more for the fun of it. I guess you can pick the ... | |
| algebra | 2/28/2010 |
| Q: "find a,b,c and d where they satisfy all the following a+b+c+d=2 //// abcd=0 //// b^c=a ... A: a+b+c+d=2 abcd=0 b^c=a d^b=a 3a -c = b -d c/a =b(a+d) tan(c)= b-2a d>a^a>b 5c>d a^b^c^d=3b-5a 10c-a ... | |
| algebra | 2/27/2010 |
| Q: "find a,b,c and d where they satisfy all the following a+b+c+d=2 //// abcd=0 //// b^c=a ... A: If c = 0, then b^c = a says that a is 1. If a is 1, this says that d^b = 1, so b must also be 0. ... | |
| University Grade Eleven Math. | 2/25/2010 |
| Q: I'm really stuck on how to determine the sums of:\ Sn=(x+2y)+(x+5y)+(x+8y)+(x+11y)+... Sn= ... A: For the 1st Σ, x is in every term. The difference of the y's is 3y, so the summation would be ... | |
| math | 2/24/2010 |
| Q: Bobby has only pennies, dimes, and quarters. One half of Bobbies coins are pennies,1/4 are quarters, ... A: Since 1/2 of coins are pennies and 1/4 are quarters, that leave 1 - 1/2 - 1/4 = 14 for dimes. Since ... | |
| perimiter | 2/23/2010 |
| Q: The perimeter of a rectangle is 34 ft., and the diagonal is 13 ft long. what are the length and ... A: Half of 34 is 17, and that is the sum of the sides. Let the sides be A and B. We know that A + B = ... | |
| first degree equations question | 2/22/2010 |
| Q: Solving first-degree equations 3x-2=16 +2 +2 what are these +2's ? ... A: The are being added to both sides of the equation. On the left side, there is a -2 in the top line, ... | |
| exponential equations | 2/22/2010 |
| Q: This is a theory question. I have attached a photo of an example problem along with notes relating ... A: Where it says, "This is where my problem is..." the problem is that is not corrrect. Example: It is ... | |
| solving linear equations | 2/20/2010 |
| Q: 3x + y = -14 4x + 3y = -22 A: The first equation only has one y, so we can subtract 3x from both sides. This gives y = -3x - 14. ... | |
| Even or Odd | 2/19/2010 |
| Q: i have a question on determining if a equation is even odd like X raise to the 4 plus x square plus ... A: x^4 + x^2 + 6 If x is odd, x^4 and x^2 are both odd, so the sum is even. When 6 is added, it is ... | |
| Algebra | 2/18/2010 |
| Q: how do i find the slope of the equation 6x-3y=30? Thank you, Meredith A: To find the slope, remember that the equation y = mb + b has m as the slope. By the way, b is the ... | |
| Distance | 2/18/2010 |
| Q: Train A leaves a station at 40mph. Two hours later, Train B leaves the same station traveling in ... A: Train A leaves at 40mph. Two hours later, it has gone 80 miles. Also, two hours later, B leaves in ... | |
| Algebra | 2/16/2010 |
| Q: Instead of dividing by 3, Juros multiplied by 3. if the answer he obtained is 9,what should have ... A: 1. If it depreciates by 20%, it is only worht 80%. Therefore take 0.8^4, and get 0.4096, so the ... | |
| algebra-quadratic equations | 2/16/2010 |
| Q: The product of four consecutive natural numbers is 5040.Find them. A: It is known that 71² = 5041, and that 71 is a little bigger than 64, which is 8². The first numbers ... | |
| Intermediate Algebra | 2/15/2010 |
| Q: I have one problem I can't figure out. It is a "solving equations by factoring" question. The ... A: When you are given -t³ - 3t² + 4t + 12, this can be factored in pieces. Note that it is -t²(t+3) + ... | |
| algebra motion problem | 2/15/2010 |
| Q: A motorcycle breaks down and the rider has to walk the rest of the way to work. The bike was ... A: The total time was 2 hours, so he road t hours and walked for 2-t hours. The total distance equation ... | |
| help me with these problem | 2/14/2010 |
| Q: a cebu pacific airbus flight took 2 hours to travel 780 miles with the headwind. the trip with the ... A: With the headwind for 2 hours, it must have been against the headwind, since that took longer. That ... | |
| FINDING THE VARIABLE | 2/13/2010 |
| Q: -a - (-3) / 3 = 10 Negative "a" minus negative 3 divided by 3 equalls 10, what is the value of "a"? A: When we subtract a negative, it turns into adding the positive. This means -a -(-3)/3 = 10 is the ... | |
| Word Problem | 2/11/2010 |
| Q: If 6 is subtracted from the largest of three consecutive odd integers, with the result multiplied by ... A: All three odd means we have n, n+2, and n+4. Subtracting 6 from the largest gives us n + 4 - 6 = n - ... | |
| Word Problem | 2/11/2010 |
| Q: In a mixture of concrete, there are three Ib of cement mix for every 1Ib of gravel. If the mixture ... A: If there are 3 lb of cement and 1 lb of gravel, that would be 4 pounds total. Since we have 3 lb of ... | |
| solving linear equations | 2/10/2010 |
| Q: 3x+y=5 4x-y=2 how do i solve this steps please! A: Solove both equations for y. That is, for 3x + y = 5, subtract 3x from both sides. You will get y ... | |
| Algebra | 2/10/2010 |
| Q: A tank is 3/4 filled with oil. after 65 liters of oil are drawn out, the tank is still half-full. ... A: 1. If 6 workers take 8 days, then the total man-days are 6*8=48. If we only have 4 workers, we need ... | |
| word problems | 2/9/2010 |
| Q: 1)a beaker contains 150cc of a solution that is 30% acid. how much water must be evaporated so that ... A: 1) If there was 150 cc that was 30% acid, there was 150*0.3 = 45 liters of acid. If this is suppose ... | |
| Algebra homework help | 2/8/2010 |
| Q: i need help with algebra homework. Solve for x in terms of y. 3x^2+ax^2=9x+9a 6a^2*x^2-11ax=10 ... A: Is see no y in the equations 3x^2+ax^2=9x+9a and 6a^2*x^2-11ax=10. If you mean solve for a, then ... | |
| Algebra | 2/7/2010 |
| Q: A tank is 3/4 filled with oil. after 65 liters of oil are drawn out, the tank is still half-full. ... A: 1. There are 2/3 as many workers, so it will take them 3/2 as long. 2. Well, 10 liters of 30% ... | |
| Algebra | 2/5/2010 |
| Q: suppose two distinct lines have the same x-intercept. what is meant by having the same x-intercept? A: If a line y = mx + b is solved for x, we get mx = y - b, so x = y/m - b/m. It can be seen the b/m is ... | |
| algebra | 2/3/2010 |
| Q: I am a parent who was long ago in math so I have a quick questions before I tell my kids the wrong ... A: If the problem were x y 1 2 2 8 3 18, it would be y = 2x². If it were x y 1 3 2 10 3 21 it would ... | |
| algebra | 2/2/2010 |
| Q: I am a parent who was long ago in math so I have a quick questions before I tell my kids the wrong ... A: Ask them to square 1, 2, 3, and 4. Write down to lists - the squares and the y values. sq y 1 2 ... | |
| manipulating formulas | 2/2/2010 |
| Q: I am trying to find the value of h to the formula A=2pir[r+h] when A=540 AND r=4.9.How do you ... A: Since the equation is A = 2π(r+h), divide both sides by the constant, which is 2π. All ... | |
| Density/Solving for x | 1/30/2010 |
| Q: I need to solve for x. The problem is a density problem with 2.70 being the density, and 2.21 being ... A: The equation for the density d is the mass m over the volume v, so written into an equation form ... | |
| Weighted Averages | 1/30/2010 |
| Q: One type of antifreeze is 40% glycol, and another type of antifreeze is 60% glycol. How much of each ... A: The 1st type is 40% gycol and the 2nd type s 60% glycol. Note that 48% is only 8% over 40% and 12% ... | |
| math algebra | 1/29/2010 |
| Q: i need to determine whether the following side measures form right triangles. 2,2, and the square ... A: There once was a man amed Pythagoras who gave us the appropriate theorem. It states that if we have ... | |
| Linear Equations | 1/28/2010 |
| Q: How do i solve for x in this type of equation? (8+3y)/(y)+(16+y)/(y)=100 A: At first, I don't see any x, but I assume you mean y. Multiply both sides by y and get 8 + 3y + 16 ... | |
| pre algebra | 1/27/2010 |
| Q: i have no idea how to do algebra can you explain how to solve this problem -16=6a-4 A: I'll capitalize A so as not to confuse it with the word "a". The problem is -16 = 6A - 4. Now when ... | |
| Graph of a function | 1/25/2010 |
| Q: How can i graph this function F(x)= 2-x^2 , using the elementary precalculus curve sketching ... A: The function is a maximum where x is 0. That means on the y axis, the value is 2. It is a parabola ... | |
| combining like terms | 1/24/2010 |
| Q: ok so i had a problem like this (1/5x + 1/2x)(1/5x - 1/4). i know that we have to distrubute and i ... A: I would write it as (x/5 + x/2)(x/5 - 1/4). Note that x is in the numerator of both terms in the ... | |
| algebra | 1/24/2010 |
| Q: In a complex inequality is m<-3 or m>3 a no answer ? A: In complex number theory, there is almost always an answer to an equality. However, for ... | |
| is Josh correct? | 1/23/2010 |
| Q: Patrick wins $250,000 in the lottery. He wants to know best way to invest. He decides that if he ... A: At 10%, 1+i is 1.1. To the 30th is 17.45. The other one is at 17.5% interest 70% of the time and ... | |
| Math problem | 1/22/2010 |
| Q: Can you tell me how to solve a problem like this step by step: When x=3 and y=5, by how much does ... A: It is known the 3² = 9 and 5² = 25. Using these, the values of the above equations can be seen. They ... | |
| average | 1/21/2010 |
| Q: The average of a and b is x. The average of b and x equals the average of a and (b + 1). Find a - b. ... A: It all comes down to determining the equations. The average of a and b is x means that (a+b)/2 = x. ... | |
| percentage of games | 1/20/2010 |
| Q: A team has won 71 games out of 116 played. If the team on average wins 3 games out of 4, how many ... A: We need the fraction of game to be 2/3. Currently it is 71/116. I could do it by incrementing the ... | |
| Exponential Equations | 1/19/2010 |
| Q: I have a math test tomorrow, and I am not doing so well with exponential equations. I am in algebra ... A: Put in various values for x. Take x -2, -1, 0, 1, and 2 and that will give us an idea of what the ... | |
| Help! | 1/18/2010 |
| Q: I need help solving this substitution method problem. x + y = -4 x - y = 2 Can you help me ... A: Note that both equations can be solved for x. The 1st one gives x = -y - 4. The 2nd one gives x = y ... | |
| exponents in scientific notation | 1/17/2010 |
| Q: for clarity ^ is to denote an exponent the problem is [4.719 x 10^6]^-4 Its been a long time and I ... A: Since the number is in brackets, the entire expression is raised to the-4. What we get is ... | |
| Homework help | 1/16/2010 |
| Q: Im having probles with these questions could you help? Write an equation for each line. Use ... A: Note that the fist one gives a vertical line. It is x = 1. On the next one, if 4y is added to ... | |
| Homework help | 1/15/2010 |
| Q: Im having probles with these questions could you help? Write an equation for each line. Use ... A: Given (x1,y1) and (x2,y2), note that m = (y2-y1)/(x2-x1). The equation can then be found as y - y1 = ... | |
| Summation of n numbers of terms of geometric progression | 1/14/2010 |
| Q: A lot of thanks and gratitude from the bottom of my heart for reading this e-mail. Sir, a research ... A: The summation of 1+2+3+4+5 + ... N = N(N+1)/2. The sum of the sum is 1, 3, 6, 10, 15, ...and is ... | |
| Algebra | 1/13/2010 |
| Q: I need help finding the five step method to solve the problem(s). The question is: One-half of a ... A: The number is N. One half of the number is N/2. One third of the number is N/3. The question says ... | |
| Division of Equations | 1/13/2010 |
| Q: How do I divide (5a^3+2)/(3a+6) and (4a^2-a)/(3a+6). Is there a way to divide them. I am trying to ... A: It is similar to long division by hand. Instead of 1's, 10's, and 100's, we have 1's, a's, and a²'s. ... | |
| Algebra 2 | 1/10/2010 |
| Q: Maria can shovel snow from her driveway in 40 minutes. bill can do the same job in 35 minutes. How ... A: The smallest common multiply of both is 280. This is 7 * 40, so in 280 minutes, Maria could shovel ... | |
| algebra-fixed cost | 1/7/2010 |
| Q: caterer charge a fix cost to prepare dinner for 100 people and an add'l cost for ea person served. ... A: Take ($1050-$750)/(150-100) = $300/50 = 6, and that is the slope. At 100 people, that would account ... | |
| indices | 1/6/2010 |
| Q: Q1.If a^p=b,b^q=c,c^r=a then find the value of pqr Q2.If a^p=b^q=c^r and b^2=ac then find the value ... A: Q1. Note that by taking ln() of te equations, we get p•ln(a) = ln(b), q•ln(b) = ln(c), and r•ln(c) = ... | |
| revenue | 1/6/2010 |
| Q: Scott bought an ice cream stand for $2,000, and he will spend an extra $200 on plywood for his sign. ... A: He gets $350 a month. He pays $150 a month in rent. Assuming no interest or other charges, the would ... | |
| Equivalent quadratic equations and expressions | 1/5/2010 |
| Q: My daughter has a homework assigment that is asking her to create equivalent expressions and prove ... A: I will assume that 25 is the distance from the shallow end to the deep end of the pool. I will give ... | |
| algebra | 1/4/2010 |
| Q: if 2x-3y=-9 and -x+3y=6 A: The 2nd equation tells us that 3y=6+x, so put that in for 3y in the 1st eqation. This gives 2x - 6 - ... | |
| unitary method | 12/24/2009 |
| Q: 7 men can do a piece of in 12 days how many men will be required to do double the work in 8 days A: If you take M as the number of men and D as the number of days, it is known that MD = K, where K is ... | |
| Hard problem | 12/23/2009 |
| Q: I have a problem that we can do for math for extra credit and i was wondering if you could help me ... A: If there is a circle with a triangle on the outside and on the inside, then the inner triangle is of ... | |
| Matrix | 12/21/2009 |
| Q: I have to develop a c program which can balance a chemical equation by the method of 'Generalized ... A: Just for fun I'm working on a program that can solve a matrix, find the inverse, or divide it into ... | |
| algebra equation with fraction | 12/17/2009 |
| Q: Here is the problem: -5 ___(16x-24)=35 ... A: An easier way to write this would have been as (-5/8)(16X-24) = 35. An even better way would have ... | |
| Algebra | 12/17/2009 |
| Q: I am having trouble finding zeros. Find the zeros of 5x3-17x2-134x+56. A: X Y 0.00 56.00 1.00 -90.00 0.38 2.38 0.40 0.08 0.40 0.00 I did that using the Secant Method. I ... | |
| algebra for a freshman | 12/16/2009 |
| Q: write the equation of a line that models a data set and use the equation to make predictions. ... A: Suppose critters that take 7 pints of water to wash the cage each day and that drink 3 pints each ... | |
| MATH | 12/12/2009 |
| Q: MY CHILD HAS ALGEBRA INPUT AND OUT PUT PROBLEMS. IT'S IN THE FORM OF A CHART. THE PROBLEMS READS ... A: If I read it correctly, that means 10 hours of training resuts in $1200 increase in sales. Thus, ... | |
| Grade Calculation | 12/9/2009 |
| Q: trying to help my daughter in 9th grade algebra. Her semester grade with be 45% quarter one grade ... A: So I assume that you're saying that the semester grade is 45% of the two quarter grades plus 10% of ... | |
| Maximize Income Question? | 12/8/2009 |
| Q: This is a bonus question from last week's alegebra assignment. I didn't answer correctly, and I'd ... A: She sells 50, and it would go up by n. She charges 1.20, and that would go down by 0.02n. The ... | |
| Algebra help | 12/8/2009 |
| Q: ok so i got the answer..but I need to know how to work it out..the book doesn't really show me..it ... A: The problem is -15xy - 10x/5x. Since there are no parenthises, division is done before subtraction. ... | |
| college algebra | 12/2/2009 |
| Q: infinite series infinity symbol n=1 (1/4)^n=? ... A: For the sum(n=0 to infinity)(a^n), if |a|<1, it is 1/(1-a). We have this with a = 1/4, missing the ... | |
| rational expressions word problems | 12/2/2009 |
| Q: if john doe of france won the first tour de france bicycle road race in 1903. In 2005, american lone ... A: John raced in 1903 and Doug raced in 2005. Let John's average speed be A. This makes Doug's average ... | |
| Inequalities | 12/1/2009 |
| Q: Good Day - Having trouble with the following: (1/2)x -2 less than or equal to 2/3x -6 In solving ... A: The equation is x/2 - 2 <= 2x/3 - 6, right? Add 6 to both sides and get x/2 + 4 <= 2x/3. Subtract ... | |
| college algebra | 11/30/2009 |
| Q: YOU HAVE 80 FEET OF FENCE YOU NEED TO MAKE A RECTANGLE PEN. ONE SIDE IS A WALL SO USE THE FENCE ON ... A: 1. ON THAT PEN, THE TOTAL FENCE USED WOULD BE L + 2W, WHERE L IS FOR LENGTH AND W FOR WIDTH. SINCE ... | |
| integers | 11/29/2009 |
| Q: R, S, and T are three consecutive odd integers and R<S<T. Which answer is greater: R+S+1 or S+T-1? ... A: If R, S, and T are three consecutive integers, S is 2 more than R, and T is 2 more than S. I'll go ... | |
| Maths | 11/28/2009 |
| Q: i need ur help for the following: - find the value of y? y= 4x - 2, x=8 - find the value of y? ... A: If x=8 and y=x-2, put in 8 for x into the second equation. The answer is y = 4(8) - 2 = 32-2 = 30. ... | |
| Stuck on some algebra | 11/28/2009 |
| Q: Here is an 'Excellence' question from my son's grade 11 assignment: A girl can save $5000 @ 5% CI, ... A: The only way to solve it that I know of is by using numerical analysis. Bisection Method ... | |
| Polynomials | 11/27/2009 |
| Q: 1- (a-5) (4a+7) I believe the answer equals 4a^2-35 is this answer correct? 2- (x-y) (3x+y-3) I ... A: 1. You multiplied the left * left and got a•4a=4a² the right * right and got -5•7=-35, but you also ... | |
| Algebra | 11/25/2009 |
| Q: This is the statement presented to us ... not sure how to answer it. I think it is backwards but not ... A: If you think of negative numbers, like -5, thenif you have 8 and you add -5, that is the same as ... | |
| algerbra 3 | 11/24/2009 |
| Q: 41-8m=57 -7x+6y-6x A: Subtract 41 from both sides of 41-8m=57 and get -8m = 57-41 = 16. Divide -8m = 16 by -8 and get m = ... | |
| alegebra 117 | 11/23/2009 |
| Q: 1. Many people know that the weight of an object varies on different planets, but did you know that ... A: a. The equation in terms of r is r = C/w. b. C = wr, w=100, r=3963, so C = 396,300. Using r = ... | |
| Algebra II | 11/21/2009 |
| Q: sqrt(8a^9)divided by squrt(b^3) = I am having difficulties solving these types of problems; ... A: The problem is √(8a^9)/√(b^3). It is known that √8 = √4√2 = 2√2. ... | |
| variables on both sides | 11/20/2009 |
| Q: 4(y+1)= 7(y-2) I don't get theses at all A: The parenthises mean to multiply what is on the outside by each element in the indside. Thus, our ... | |
| Variation and problem solving | 11/17/2009 |
| Q: Supose x varies directly with y and inversely with the sqare root of z. If x is 5/2 when y is 2 and ... A: It is said that x = Ay/√z. Putting in x=5/2, y=2, and z=16 give us 5/2 = 2A*(1/√16) = ... | |
| ap calculus ab | 11/11/2009 |
| Q: my problems (set 3): In Exercises 4 and 9, find dy/dx. Use your grapher to support your analysis if ... A: 4. This is a product rule. That's y = f(x)g(x) where f(x)=x and g()=secx. The derivatives are ... | |
| Enhance my understanding, please.. | 11/11/2009 |
| Q: What are extraneous solutions of an equation? And why do they sometimes occur in the process of ... A: Extraneous solutions arise when we solve the problem by multiplying by some expression that cancels ... | |
| Equation of a Parabola | 11/10/2009 |
| Q: I'm not even sure how to start this. I took a stab at it but this just doesn't look right. I'm going ... A: Take the Angle as A, the Range as R, and the Height as H. We know R = 160 = V0•cosA and H = 60 = ... | |
| algebra | 11/8/2009 |
| Q: Subtract and simplify if possible: 2-z/z-9 - 6z-7/9-z A: I will assume it is really suppose to be (2-z)/(z-9) - (6z-7)/(9-z). Note that if you multiply the ... | |
| algebra | 11/8/2009 |
| Q: Solve for x: (x^2 - 5x + 5)^x^2-9x+20 =1 a) 4 and 5 b) 1 and 4 c) 1,4 and 5 d) 2 and 3 e) 1,2,3,4 ... A: I will assume that since this is suppose to be solvable, it should really be (x^2 - 5x + ... | |
| Symbol help | 11/7/2009 |
| Q: My uncle wants me to help with an algebra assignment, their all pretty easy equations, I just don't ... A: The ^ symbol is used, for example, for 6^2 = 6*6 = 26; 5^3 = 5*5*5 = 125; 3^4 = 3*3*3*3=81. ... | |
| Intermeidate Algebra | 11/6/2009 |
| Q: I am struggling a lot with a few questions here. Here they are.... I need to use factoring and the ... A: Is the equation 7x² - 5x + 15 = 3(5-x²)? That is that same as 7x² - 5x + 15 = 15 - 3x². Adding 3x² ... | |
| algebra | 11/6/2009 |
| Q: Multiply: (-4n)^2(3n^5)^2=(-4*3)^2(n*n^5)^2=24 *n^6^2 ? The exponents outside the parentheses has ... A: The exponets apply to every term inside the parenthesis. For (-4n)^2, you get 16n^2. For (3n^5)^2, ... | |
| ap calculus ab | 11/6/2009 |
| Q: my problems (set 3): 2. What is the limit of (4-x²)/(x²-1) as x approaches ∞? (A) 1, (B) 0, ... A: There may be several question, but they won't take long to answer. 2 Divide numerator and ... | |
| college algebra | 11/5/2009 |
| Q: find the intercepts of the polynominal function f(x). find the intervals for which the graph of f is ... A: The function is x³ + 4x² - 7x - 10. The first one to try is x=1, which gives 1+4-7-10, which is -12. ... | |
| college algebra | 11/5/2009 |
| Q: 1. in 1906 the fastest time for an american man to run a mile was 4 minutes and 30 seconds runners ... A: 1. 1906, 4.5m, 1957, 4m The average is (4.5-4)/(1957-1906) = 0.5/51 = 1/102. 2. 2000 380 2005 392; ... | |
| Algebra Word Problem | 11/5/2009 |
| Q: Suppose that the number of cars, C, on 1st Avenue in a city over a period of time t, in months, is ... A: I can tell this is going to say , 'You're welcome.' Yet if you want to read on, there's more stuff ... | |
| algebra | 11/5/2009 |
| Q: I am supposed to use the quadratic formula to solve this equation: x^2-5x= -10 A: To use the quadratic equation, put it in its proper form. That would be x² - 5x + 10 = 0. Thus, we ... | |
| Algebra Word Problem | 11/4/2009 |
| Q: Suppose that the number of cars, C, on 1st Avenue in a city over a period of time t, in months, is ... A: Since the equation we are given is C = p•a^t, the value of a needs to be less than one for the ... | |
| unitary method question | 11/4/2009 |
| Q: A garrison of 2000 men has provisions for 54days. At the end of 15days a reinforcement arrives and ... A: Since there are 2,000 men and there are 54 days of food, that means that there is enough food for ... | |
| Algebra | 11/4/2009 |
| Q: Simplify Expression. How do you know when to add or subtract? Example -5x +16-8x-14+10x = -13x+2+10x ... A: The sign in front tells you. -5x means subtract 5x. +16x means to add 16x; if in front, it would be ... | |
| algebra | 11/4/2009 |
| Q: I am supposed to multiply: (v+d)(v^2-vd+d^2) I was using the FOIL method and got confused,I think. ... A: If we do (v+d)(v^2-vd+d^2), the first term is v^3. Next we do it in pairs. We have v * (-vd) + ... | |
| question | 11/3/2009 |
| Q: Please tell me how can i solve it without using any calculator: 0.456/74 85.02/3.678 A: If its a normal calculator, type 0.456, then press the division (/ or ÷), the type 74, then press =. ... | |
| Quadratic Functions | 11/3/2009 |
| Q: Gravity. A person holds a pistol straight upward and fires. The initial velocity of most bullets is ... A: We are given that h(t) = -16t² + 1200t. To see when it hits the ground, solve for when h(t) = 0. ... | |
| algebra | 11/3/2009 |
| Q: I am supposed to use rational exponents to write x^1/9 *y^1/5 *2^1/3 as a single radical expression A: Well, the denominators of all the powers are 9, 5, and 3. Clearly 9 is divisible by itself and 3, ... | |
| algebra | 11/2/2009 |
| Q: I need to find the x intercepts for the graph of the equation: y= x^2 + 3x-10 A: TO find the x intercepts, factor the function. 10 = 2*5, and 5-2=3, so the factors are (x-2)(x+5). ... | |
| algebra | 11/2/2009 |
| Q: I am supposed to convert to decimal notation: 8.12 * 10^7 A: It is known that 10^7 means a 1 followed by 7 0's. Thus, 10^7 = 10,000,000 (ten million). Multipying ... | |
| LCM of fractions | 11/2/2009 |
| Q: I wanted to know as to how we calculate LCM of fractions?? for example finding the LCM of 2/3 and ... A: To determine the best denominator with fractions, determine the LCM of the denominators. The lowest ... | |
| algebra | 11/1/2009 |
| Q: I am supposed to give exact solutions to three decimal places: x^2+12x+36=4 Is it 2.000 and 6.000? A: If you put in 2 you get 2² + 12•2 + 36, pr 4 + 24 + 36 = 64, which is not 4. It is 4³, however, but ... | |
| algebra | 10/30/2009 |
| Q: Solve for x: x^2 + 29 = 4x I don't know which x I am solving for, and the text book doesn't ... A: There is an x² in the equation, which means it is a parabola. When solving parabolas, put everything ... | |
| math | 10/30/2009 |
| Q: suppose you have 32 D quaters and 36 P quaters. what is the greatest number of groups you can make ... A: It looks like this problem is asking for the greatest common divisor of 32 and 36. If the groups ... | |
| Algebra II | 10/30/2009 |
| Q: (x 3 - 4x 2 + 4x - 1) ÷ (x -1). I'm horrible at math like this :( A: Well, maybe I'll change that :( to a :) or a :•) if there is a nose involved. The problem is x³ - ... | |
| algebra | 10/27/2009 |
| Q: A triangle sides have lengths 1/(x+2) , 1/(x+1) , and 1/x , what are the possible values of x ?. A: First, sides have a positive length, so x>0, x+1>0, and x+2>0 are all met if x>0. Next, note that ... | |
| Algebra II | 10/27/2009 |
| Q: 1. 6 + 5 | 2 r - 3 | ≥ 4 2. 8 = | 5 y + 2 | 3. | 2 t - 3 | + 2 = 5 A: 1. Subtract 6 from both sides. We get 5|2r-3| ≥ -2. Since absolute values are always ... | |
| Word problem | 10/27/2009 |
| Q: Your brother has $2000 saved for vacation. His airplane ticket is $637. Write and solve an ... A: He had $2000 originally. He then spent $637 on a plane ticket. Doing the subtrraction, he realized ... | |
| Functions and their graphs | 10/25/2009 |
| Q: for the given functions f and g, find the composite fundtions f0g and g0f and state their domains: ... A: The composite fog(x) is f(g(x)), which means take g and put it in for x in f. The composite g0f(x) ... | |
| College algebra | 10/23/2009 |
| Q: i have a couple questions i did them already but i do not know if i did them right. ... A: The functions are increasing where they have a positive derivative and decreasing where they have a ... | |
| college algebra | 10/23/2009 |
| Q: Find (fog)(x) and (gof)(x). Also specify the domain for each. Problem#21) f(x)=1/x-1, g(x)=2/x A: fog(x) is g(x) put into f(x) as x. I write f(g(x)) = 1/g(x) = 1/(2/x). I rewrite the top, so we have ... | |
| math | 10/23/2009 |
| Q: sir please tell what is the difference beetwen sin^(A+B) and sin(A+B)^2. is both of these two ... A: If you mean the difference between sin²(A+B) and sin(A+B)², here's the difference. On the first ... | |
| algebra | 10/23/2009 |
| Q: Determine the linear function whose graph is a line with a slope of 2/3 and contains the ... A: There is a formulal for this. It is y-y0 = m(x-x0) where (x0,y0) = (-1,3) and m = 2/3. That makes ... | |
| algebra equations with fractions | 10/23/2009 |
| Q: What are the steps to solve the following equation: 1/4x + 1/2 = 1/4x - 1/2 A: The first thing I would do would be to multiply each term by 4. That gives x + 2 = x - 2. Subtract ... | |
| Algebra Zero-product problem | 10/22/2009 |
| Q: Solve 3x^4=24x by factoring and then using the zero-product principle. I've tried this, and kept ... A: The problem needs to have all taken to the left, so it is 3x^4 - 24x = 0. Note that a 3x can be ... | |
| math | 10/22/2009 |
| Q: find the quotient and remainder 2x^5=4x^4-x^3-x^2+7 by 2x^-1 factor P{x}=2x^4-9x^3+9x^2+x-3 let all ... A: Find the quotient and remainder 2x^5+4x^4-x^3-x^2+7 by 2x^-1 When you have an exponent that is ... | |
| equations and inequalities | 10/21/2009 |
| Q: A: An equation is where the expressions on the left side of the equal sign are the same as the ... | |
| Matrices | 10/21/2009 |
| Q: I have one question please help me regarding that i will very thankful to you. i.e. Show that there ... A: Let A be a11 a12 a21 a22 and B be b11 b12 b21 b22. Now if we take AB we get a11•b11 + ... | |
| point-slope form | 10/21/2009 |
| Q: i can't fiqure out how to slove the problems that ask to Find the equation (in slope-intercept ... A: The points given are (-1,-3) and (2,-4). I will say that (x1,y1) = (-1,-3) and (x2,y2) = (2,-4). ... | |
| graphing | 10/20/2009 |
| Q: Write a function whose graph Y=x(to the third) reflected about the x-axis and the y-axis.. A: The function is y = x^(1/3). To reflect about the x-axis, take the negative of the function. The ... | |
| college algebra | 10/20/2009 |
| Q: investing money. mr. and mrs jackson invested some money at 6% simple interest and some money at 10% ... A: I will assume that both rates are paid yearly. Lets say that X was invested at 6%. This says that ... | |
| Formula Rearranging | 10/19/2009 |
| Q: : ) So I'm a little stuck on what to do after a step. I don't expand the brackets, but if you could ... A: This first note is about [subject = y] w = a(mx - by) This is not right: w/a = mx - by; ... | |
| how do solve these problems | 10/19/2009 |
| Q: how do you solve these problems using the substitution and elimination method,...the problems are ... A: Take the equations 2x+y=13 and 5x-2y=1. Solve the 1st for y, giving y=13-2x. Put that in the 2nd, ... | |
| Help Me please | 10/18/2009 |
| Q: In triangle ABC, a = 5, b = 9, and c = 6. Find angle A, angle B, and angle C. Express the trig ratio ... A: I used one of the law of cosines: Given a triangle with sides a, b, c and opposite angles A, B, C, ... | |
| Algebra 2/Trig | 10/18/2009 |
| Q: Express the following equation is simplest form: 36-x^2/x^2+8x+12 / x^2-6x/x-2 A: Taking that as written, * and / are always done first. This gives 36 - x²/x² + 8x + 12/x² - 6x/x - ... | |
| I don't understand quads | 10/16/2009 |
| Q: 1. Suppose you are an event coordinator for a large performance theater. One of the hottest new ... A: Note: if I get too busy on some day, I wouldn't answer this. However, I have less than half a dozen ... | |
| I am trying to understand... | 10/16/2009 |
| Q: Pay attention to the units of measure. You may have to convert from feet to miles several times in ... A: Now I didn't have very many questions, so I answered this. However, if I get busy, I tend to reject ... | |
| proof | 10/16/2009 |
| Q: could you plz give me a hint about the problem below: Use induction on the size of S to show that ... A: Take S as (2,3,4). |S| = √(2²+3²+4²) = √(4+9+16) = √29. S^2 = 29, so |S^2| = 29. ... | |
| Algebra Fractional Coefficients w/ multistep equate | 10/16/2009 |
| Q: 4m/5 + 2m/3 = 5 Thank you A: Take 4m/5 + 2m/3 = 5 and multiply by 3 and 5, so multiply by 15. That is, 15*4m/5 + 15*2m/3 = 5*15. ... | |
| algebra | 10/15/2009 |
| Q: When a number is added to 4 times itself the result is 16 more than the number? A: When a number is added to 4 times the number, that is the same as n + 4n = 5n. The result is 16 ... | |
| Real Number | 10/15/2009 |
| Q: Let n ≥ 2 be an integer and let x1, x2, ......., xn ∈ {−1, 1} such that x1x2 + ... A: If xi is an element of {-1,1}, then let n be 2. The results are x1 x2 x1•x2 + x3•x1 1 -1 -1 + -1 ... | |
| algebra | 10/15/2009 |
| Q: Rewrite with rational exponents: (sqrt5mn)^7 is the answer 5mn^7 A: The answer to (sqrt5mn)^7 is √(5mn)^7 = 5³m³n³√(5mn) = 125m³n³√(5mn) since the ... | |
| algebra | 10/15/2009 |
| Q: I am supposed to simplify by factoring: index number is 3 sqrt radicand is 270 * t^8 Is it the ... A: Do you mean the cube root of (270t^8)? I'll go with this one. Cube root of 27 is 3 since 3*3*3=27. ... | |
| algebra | 10/15/2009 |
| Q: Please help me understand how to answer this question. 2=10+Z/-3 A: There are two ways to read this. If it were 2 = 10 + Z/-3, I'd take the 2nd way. Since there are no ... | |
| Finding domain. | 10/14/2009 |
| Q: An open box is to be made from a flat piece of material 11 inches long and 6 inches wide by cutting ... A: The domain is what values of x are possible. The problem is right: nothing needs to be done. Not ... | |
| math | 10/14/2009 |
| Q: A single person takes 6 minutes to fill a bottle. If from 11 a.m. to 12.30a.m. ,1845 bottles are to ... A: A single person takes 6 minutes to fill a bottle. 11:00am to 12:30am is really 13.5 hours, since ... | |
| math | 10/14/2009 |
| Q: Mr. Merrill has 3 times as many nickels as dimes. The coins have a total value of $1.50. How many ... A: Let D = # of dimes. The number of nickels is 3D. This means the total of having 1 dime would found ... | |
| algebra-sqare roots | 10/13/2009 |
| Q: I am supposed to add and simplify by collecting like radical terms. sqrt 5a + 7 sqrt 45a^3 A: For √(45a^3), that can be split up so that it is √9√5√a²√a. This can ... | |
| algebra | 10/13/2009 |
| Q: If x^2+y^2+z^2=41056 what is x+y+z A: The four ways that I found to do it are 12 40 60 76 84 84 60 84 184 180 184 168 In the row below in ... | |
| algebra | 10/13/2009 |
| Q: Twelve year old Aaron bought old bikes at an auction for $350. He fixed them and sold them for $50 ... A: Total cost is 350 + 50N, where N is the number of bikes. Selling them gives him $62,000. He sold ... | |
| math | 10/12/2009 |
| Q: 12 men and 18 boys working 15/2 hours a day can do a certain work in 60 days.if 1 man works equal to ... A: Since 1 man = 2 boys, we had the equivalant of 12 + 18/2 = 12 + 9 = 21 men. It took a total time of ... | |
| I want to make sure I am on the right track... | 10/12/2009 |
| Q: The Environment Environmental and wildlife preservation ensures future generations will have ... A: 1. The cost, in millions of dollars, to remove x % of pollution in a lake is modeled by C = ... | |
| college algebra | 10/12/2009 |
| Q: 1. simplify 3 square root 3 +2 square root 8? 2. simplify 1/x + 4/x^2 - 4 - 2/x^2 - 2x 3. ... A: 1. 3√3 + 2√8 = 3√3 + 2√4√2 = 3√3 + 2*2√2 = 3√3 + ... | |
| Math problem | 10/8/2009 |
| Q: Steve recent retiree, requires $5000 per year in extra in. He has $70,000 to invest and can invest ... A: Bonds at at 8% and CD's are at 5%. The required income is $5,000. He has $70,000. Take the the ... | |
| math | 10/8/2009 |
| Q: 8x-4=12+x just need to know how to get the answer and how to make sure if the answer is correct A: Take 8x - 4 = 12 + x and subtract x from both sides. The result is 7x - 4 = 12. Now take 4 and add ... | |
| math | 10/8/2009 |
| Q: If a +1/a=3 then a^3 +1/a^3 = ? A: If a + 1/a = 3, then a² + 1 = 3a, so a² - 3a + 1 = 0. a is found by the quadratic equation as ... | |
| problem solving | 10/8/2009 |
| Q: an 8 year old boy named Nathan wants to compare his age with that of his mother and grandfather. ... A: a) I'll say that the boy is B, the mother is M, and the grandfather is G. The equations we are given ... | |
| problem solving | 10/8/2009 |
| Q: use ohm's law to find the amount of current that would flow in a circuit that contains a 10(v# ... A: a) Ohm's law is in volts, ohms, and resistance. I = V/r, which are I=current, V=voltage, ... | |
| problem solving | 10/8/2009 |
| Q: use ohm's law to find the amount of voltage required to cause 0.005 amps of current to flow through ... A: You cold also put 'electiricity volts amps' in the search box and more info on the subject will ... | |
| rationalize the denominator | 10/7/2009 |
| Q: Please help, I am supposed to rationalize the denominator: sq rt r -sq rt s divided by sq rt r + sq ... A: So that is (√r - √s)/(√r + √s)? Multiply the top and bottom by (√r - ... | |
| substitution | 10/7/2009 |
| Q: x + 9y = 88 2x + 8y = 86 practice problem and i cannot get it A: Given x + 9y = 88 and 2x + 8y = 86, the first one can have 9y subtracted from both sides, giving x ... | |
| distance problem | 10/7/2009 |
| Q: mark leaves the house for school walking at the rate of 4kph. after 2 hrs, Jane follows mark at a ... A: If he is walking at 4kph, and leaves 2 hours early, he has walked 8k already. Since she walks 2k ... | |
| algebra | 10/7/2009 |
| Q: A rectangle with a diagonal of length is twice as long as it is wide. What is the area of the ... A: The length of this rectange is A and the width is X, so the area is AX. The diagonal has length 2X. ... | |
| adding square roots | 10/6/2009 |
| Q: I am supposed to add and simplify by collecting like radical terms if possible: 6 sqrt 45 + 9sqrt ... A: It is known that 45 = 3*3*5. That looks like there are 2 3's there, so √45 = ... | |
| echelon form matrices | 10/6/2009 |
| Q: convert the matrix to echelon form: 1 0 1 -2 2 1 3 -4 -1 0 -1 2 4 -1 1 -1 and find the rank ... A: To convert a matrix to row echelon form, never multiply a row by anything to replace that row. Only ... | |
| need help with slope intercept | 10/6/2009 |
| Q: How do I write the equation in the slope-intercept form? 4x - 10y = 11 A: To put it in slope-intercept form, it needs to be y = mx + b. In that case, m is the slope and b is ... | |
| surface area of silo | 10/5/2009 |
| Q: they gave us a formula for the surface area of a silo: S=2*pi*r*h + pi*r squared then, they said ... A: That is the write equation, but I would put in all in Excel and use pi(). For the final result, ... | |
| linear models | 10/4/2009 |
| Q: what are linear models? how do you know if an equation is a linear model? are all linear models ... A: A linear model is when linear equations are used. If there are two variable and two unknowns, the ... | |
| unitary method | 10/4/2009 |
| Q: a contractor undertakes to dig a canal 6 km long in 35 days and employed 90 men.he finds that after ... A: Canal: 6 km long; Men: 90; Days to do it: 35. Time passed: 20 days; Canal built: 2km. How many men ... | |
| Word Problem | 10/2/2009 |
| Q: A store uses twice as many five-dollar bills as ten-dollar bills. $2500 was obtained in five- and ... A: Let the number of tens be T. The number of fives is twice this number, so it is 2T. They total of ... | |
| algebra | 10/1/2009 |
| Q: The table shows the number of active red-cockaded woodpecker clusters in a part of the De Soto ... A: Looking at the numbers, the years increment by one each time. A good way to do it would be to call ... | |
| Algebra | 10/1/2009 |
| Q: Tell me EVERY STEP on how to solve Addition Equations (algebra) A: I need to see an equation. If it is a linear equation, put all of the variables on one side and the ... | |
| intermediate algebra | 10/1/2009 |
| Q: What are the steps to the elimination method A: What the elimination method is is when you multiply both equations by most likely different ... | |
| Algebra 1 | 10/1/2009 |
| Q: How would you solve this radical equation: 2x to the 4th power y to the negative 4th power z to the ... A: Is this [(2x)^4](y^-4)(z^-3)/{[(3x)^2](y^-3))(z^4)}? Putting facors in the top makes the exponent ... | |
| Algebra! | 9/30/2009 |
| Q: Peter is reading a 193-page book. He has read three pages more than one fourth of the number of ... A: He has read N pages. He has not read 193-N pages. N - 3 = (193-N)/4, so multiply both sides by 4. ... | |
| Motion word problem | 9/30/2009 |
| Q: Train A travels 12 mph slower than Train B. Train A travels 200 miles in the same time it takes ... A: A = velocity of train A, B = vecocity of train B. A can travel 200 miles in the same time it takes B ... | |
| Converting non-linear graphs into linear | 9/29/2009 |
| Q: What are the methods of converting non-linear graphs to linear one?? what is the advantage in doing ... A: The method is called finding a best fit straight line. Count the terms and call it N. Find the sum ... | |
| algebra | 9/29/2009 |
| Q: While on vacation, Talisha won a lot of tickets at two arcades on the boardwalk she was visiting. ... A: Since I gives 12c profit and II gives 10c profit, start with 1. 10c is not divisible by 12, ... | |
| Binomial theorem | 9/29/2009 |
| Q: I am wondering if you can help me solve this problem: the binomial coefficient of the the 4th term ... A: The 1st term in each row is nC0. The 2nd term in each row is nC1. The 3rd term in each row is nC2. ... | |
| substitution | 9/29/2009 |
| Q: solve the system using substitution. x-6y=64 9y-10x=-181 A: From the first equation, we can add 6y to both sides and get x = 64+6y. This can be substituted ... | |
| Substitution and Elinination | 9/28/2009 |
| Q: Pietro needs to rent a truck for 1 day. He calls two rental companies to compare costs. Joe's garage ... A: Let k = kilometer travelled. The costs are $80 + $0.22k and $100 + 0.12k Set 80 + 0.22k = 100 + ... | |
| algebra | 9/28/2009 |
| Q: how do i solve this problem? x+2y=-1 5x-4y=16 A: I thought I just answered this? Oh yeah, here it is. I'll paste it in. The first equation can ... | |
| algebra | 9/28/2009 |
| Q: What percent larger than 8 √2 is 12 √2 A: To get from 8√2 to 12√2, you can divide both by 4√2, so the problem become from ... | |
| translating and solving inequalities | 9/27/2009 |
| Q: Martin is paid $200 a week plus a commision of $25 on each television she sells. How many must she ... A: The amount she is paid is $200 + $25n, where n is the number of television sets. To make at least ... | |
| Binomial theorem | 9/26/2009 |
| Q: I am wondering if you can help me solve this problem: the binomial coefficient of the the 4th term ... A: I don't think so. I believe it is n = 8. What you are looking for is a row in which 4th term is ... | |
| Combinations | 9/25/2009 |
| Q: A panel of judges is to consist of two women and five men. A list of potential judges includes five ... A: The panel needs 2 women out of 5 choices. The answer for women is 5 choose 2, which is ... | |
| Lines | 9/25/2009 |
| Q: Solve each linear system by graphing: 4x - y + 6 = 0 X + y - 1 = 0 A: Note the easiest way to graph these lines is to see where they cross the axis. The first is 4x - y = ... | |
| restrictions in solving equations | 9/24/2009 |
| Q: I am having a hard time understanding why the denominator or numberator being 0 would be a ... A: numerator=0, denominator<>0 ---------------------------------------------- If the problem were x/y, ... | |
| unit rates and proportions | 9/24/2009 |
| Q: im in eighth grade and im having trouble understanding unit rates and proportions. Can you help ... A: Rates ---------- The speed of an item is the rate at which it travles. Speed is in feet/sec, ... | |
| algebra, graphing functions | 9/24/2009 |
| Q: How to explain why and correct terminology to use in explaining how to graph transition of y= sq ... A: It is shifted to the right since where x=3, it is like wherex=0 for the √x. Put x=3 in the ... | |
| Algebra | 9/24/2009 |
| Q: The perimeter of a rectangle is 36yd. The width is 18 yd less than twice the length. Find the length ... A: Give a rectangle length L and width W. Using this, the perimiter of a rectangle is 2L + 2W. We are ... | |
| Domain Of A Function | 9/24/2009 |
| Q: How do you find the domain of a function? Please keep in mind that I'm only in Algebra and complex ... A: The domain is all x that can be put in the function. Examples: y = x²; domain is all x, or ... | |
| objective functions | 9/22/2009 |
| Q: Can you please help me set this up? Craft stores can make a fancy cloth in 2.5 hours and a casual ... A: This is what you don't need to read, and if you want, skip after the double line. ... | |
| Probability | 9/21/2009 |
| Q: First of all, thank you for your time. I'm trying to follow my class notes on this, but none of them ... A: By AnB, I mean "A intersect B". The entire set has the first one as H or T and the second one as ... | |
| Hi I have a really hard factoring question | 9/21/2009 |
| Q: I just failed a math test and need to know 18x^2 - 25x - 3 factored A: The factors look like they need the quadratic equation to be found. Here, a=18, b=-25, and c=-3. ... | |
| Probability | 9/21/2009 |
| Q: In a clinical trial, a drug used to reduce fever caused side effects in 3% of the patients who took ... A: Given that both of the patients had the drug, they each had a 3% chance of side effects. The ... | |
| algebra | 9/21/2009 |
| Q: 6x +5y=7 x-y=3 using substitution A: Looking at the second equation, that can easily be solved for x. That is done by adding y to both ... | |
| Algebra | 9/21/2009 |
| Q: Without graphing, how can you tell if the following three points make the vertices of a right ... A: The only way that three points can't make a triangle is if they are all in a row. Looking at points ... | |
| Marble Problem | 9/16/2009 |
| Q: I'm in seventh grade, and I need a little help. This question is in my pre-algebra book: The marble ... A: Even numbers always end in 0, 2, 4, 6, or 8. This says the Emporium selss bags of marble, but it ... | |
| algebra | 9/16/2009 |
| Q: Charles wants to build a vegetable garden such that three sides of the garden are fenced and the ... A: The field has width of W and length of L. The area is A = WL. We also know that 2W + L = 30, we L ... | |
| radical form? | 9/15/2009 |
| Q: i need help with radical form questions (writing in radical form) 1. x^2/3y^1/3 2. x^3/5y^4/5 ... A: 1. x^2/3y^1/3 I will assume that one is x^2/(3y^(1/3)). Multiply the top and bottom by y^(2/3) and ... | |
| exponential form? | 9/15/2009 |
| Q: 1. ^3sqrtA 2. ^7sqrtA^2*B^4 and the other question asks the difference between -sqrt4 and sqrt4? ... A: 1. Usually ^ follows a number. For example, '2^3' means '2 cubed', or 2*2*2 = 8. 3^4 = 3*3*3*3 = ... | |
| Help | 9/15/2009 |
| Q: I need help with a few questions. 1. If c^2=d, then c is the (need to enter word) of d 2. another ... A: 1. c^2 is known c squared = c*c. The oppositve of ^2 is ^(1/2), or the opposite of square is ... | |
| algebra word problems | 9/14/2009 |
| Q: The lenght of a rectangle is 7inches grater than its width. the perimeter of the rectangle is ... A: Rectangle ------------------ Call L the length and W the width. We know that L=W+7. The perimeter ... | |
| Simplifying..... with square roots? | 9/14/2009 |
| Q: Wilson, I seem to have hit a speed bump in algebra. It involves square roots. Its states to ... A: The square root of a*a is a. The square root is also sqrt or √. It is good to know that ... | |
| Solve in Simplest Radical form? | 9/14/2009 |
| Q: I need help trying to figure out some algebra questions. It says solve the following, express your ... A: It is known that sqrt(a*a) = √(a*a) = a and a² = a*a. 1. √(1/121) = 1/√121 = ... | |
| algebra | 9/13/2009 |
| Q: A driver travels 12 miles to work at a constant speed and travels the same distance home also at a ... A: Delmy Country: United States Category: Algebra Private: No Subject: algebraA driver travels 12 miles ... | |
| highschool algebra II. | 9/12/2009 |
| Q: Solve. 2k+5(-9k-5)=24+6k A: Take 2k+5(-9k-5)=24+6k and multiply out what is in the parenthesis. The result should be 2k -45k - ... | |
| unitary method | 9/12/2009 |
| Q: 95 men had provisions for 200 days.After 5 days 30 men died due to an epidemic.The remaining food ... A: If 95 men had provisions for 200 days, that meants they had 200*95 days of food. 200*95 is 19,000. ... | |
| algebra word problems | 9/11/2009 |
| Q: an ultra light aircraft flies to a nearby town that is 20 miles away in 2/5hour with a tail wind. It ... A: 1. Let S=speed of plane, W=wind speed, D=distance, T1=time, T2=time, R1=rate, and R2=rate. This ... | |
| Algebra | 9/11/2009 |
| Q: What is the slope of the line passing through points A (5,4) and B(0,3)? A: The slope of a line is rise/run. The rise is the difference in y values and the run is the ... | |
| unitary method | 9/11/2009 |
| Q: If 9 examiners can examine a certain number of answer books in 12days by working 5 hours a day;for ... A: If 9 examiners, 12 days, 5 hours a day, is 9 people for 60 hours, is 540; 4*30*x = 2(540). 120x = ... | |
| distributing fractions in a linear equation | 9/11/2009 |
| Q: -1/6(x-18)+1/3(x+3)=x+34 How do i get rid of the fraction and how do I distribute it? A: I will assume that the equation does not have the polynoimials in the denominator, i.e., it can ... | |
| math tutor | 9/10/2009 |
| Q: I am trying to help tutor my son through his math class. Here is the question. If you can get me ... A: The first point is (-1,2) and I will call it (x1,y1). The second point is (3,1) and I will call it ... | |
| unitary method | 9/10/2009 |
| Q: If 9 examiners can examine a certain number of answer books in 12days by working 5 hours a day;for ... A: There are 9 examiners. The time worked by each of them is 12*5 = 60 hours. The total hours would ... | |
| Speed, time and distance algebra | 9/10/2009 |
| Q: A man travels 108km at a constant speed and finds he could have made the journey 4.5 hours shorter ... A: If he had gones at 6kph, it would be 18 hours. If he had gone two faster, at 8kph, it would have ... | |
| solving equations for x | 9/10/2009 |
| Q: i have had a complete brain lapse, i am doing an algebra review in my trigonometry class and i can't ... A: The first thing to do is to subtract 6 from both sides, so we have an equation equal to 0. That ... | |
| factoring | 9/9/2009 |
| Q: how do i factor this: 24x^3y-8x^y A: The numbers are 24 and 8. That factors of 24 are 3*2*2*2 and the factors of 8 are 2*2*2. It can be ... | |
| Polynomials | 9/9/2009 |
| Q: I've already taken Algebra 1 and now I'm in the second course...however I don't understand ANYTHING! ... A: Polynomials are a set of numbers to a power. Explanantion of powers: 3x + 1 is 3*x, +1. 4x² + 5x + ... | |
| Ratio, proportion, unit rate, percent. 7 questions | 9/9/2009 |
| Q: 1.Represent the ratio as a unit rate. $2.40 for 15 ounces of popcorn 2.$47.25 for 35 disks 3. Which ... A: c is used after money, ie 10c=10cents 1.Represent the ratio as a unit rate. $2.40 for 15 ounces of ... | |
| problem solving (applications to linear equations) | 9/9/2009 |
| Q: 1) Josie can eat a big pizza pie alone in twenty two minutes while Christy can eat a pizza of that ... A: It takes Jose 22 minutes and Christy 16 minutes. After 1 minutes, Jose would have eatern 1/22 of ... | |
| algebra | 9/8/2009 |
| Q: what is 3% of $24,590.00 A: 3% is the same as 3 parts out of 100 parts. This means we multiply by 0.01 and then multiply by 3 to ... | |
| unitary method | 9/8/2009 |
| Q: If 7 needlewomen can finish a piece of work in 10 5/8 days of 9 3/5 hours each,how long will it take ... A: Note that 1/8 = 0.125, so 5/8 = 0.625. Also note the 1/5 = 0.2, so 3/5 is 0.6. We have 7 N, N for ... | |
| unitary method | 9/7/2009 |
| Q: If 70 men dig 1 hectare 500 sq.m in 5 days,how many men will dig 2 1/4 hectares in 25 days. ANSWER: ... A: kMD=H where k is a constant, M is for men, D is for days, and H is for hectares. Note that at first, ... | |
| unitary method | 9/6/2009 |
| Q: If 70 men dig 1 hectare 500 sq.m in 5 days,how many men will dig 2 1/4 hectares in 25 days. A: The time of the 1st one is 5 days, the time of the 2nd one is 25 days. This means we only need 5/25 ... | |
| How to solve fraction inequalities | 9/5/2009 |
| Q: The equation is as follows: (x/2)-(5/2) < (x/3)+1 I am clear about getting like terms on each side ... A: First the denominator needs to be looked at. There terms in the denominator are 2, 2, and 3. The 1 ... | |
| refresher so i can help my daughter | 9/4/2009 |
| Q: how to solve this? (3x-16) + (4x-8) = 60 A: The parenthesis can be dropped since both of them are added. The result is 3x - 16 + 4x - 8 = 60. ... | |
| ECN Algebra, YUCK! | 9/2/2009 |
| Q: If Amy Spends her entire allowance she can afford 6 candy bars and 6 comic books a week. She could ... A: The price of candy bars is 40 cents. That means that 6 candy bars is $2.40 and 10 candy bars is $4. ... | |
Algebra
Answers by Expert:
Scott A Wilson
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Any algebraic question you've got, like linear, quadratic, exponential, etc.
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solving story problems
solving linear, parabolic, and 3rd order equations
solving equations with multiple variables
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documents at Boeing
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MS at math OSU in mathematics at OSU
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both BS and MS degrees were given with honors
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