# Questions on Algebra: Polynomials, rational expressions and equations answered by real tutors!

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 Algebra: Polynomials, rational expressions and equations Solvers Lessons Answers archive Quiz In Depth

 Question 455249: Essay question: show all work. Find the difference: (-8x2 – 8x – 4) – (-2x2 – 7x + 3) Click here to see answer by rfer(12670)

 Question 455657: Using the Point-Slope form to write equations m=3/4, (2,-6) y--6=3/4(x--2) How do I solve this problem? Click here to see answer by mananth(12270)

 Question 455817: The width of a rectangle is 13 inches less than 4 times the length. If X represents the length, write an algebriac expression in terms of X that represents the area of the rectangle and simplify. So I was thinking 4*X-13? Click here to see answer by stanbon(57387)

 Question 307863: Post a response to the following: Explain three rules for exponents listed in the chart on p. 239 (section 4.2). Do not explain the first two definitions listed in the table (Exponent of 1 or 0). Create an expression for your classmates to solve that uses scientific notation and at least one of the rules for exponents you have described. Click here to see answer by babylibra(1)

 Question 455920: show all work. Bob’s Barber Shop estimates their gross revenue for the second quarter to be given by the polynomial 2x3 – 3x2 + 7x – 1. The shop estimates their costs for that quarter to be given by x2 + 4x + 2. For the second quarter, find and simplify a polynomial that will represent their profit. Click here to see answer by stanbon(57387)

 Question 455930: which property of real nubers is this? xz + 2x = (z+2)x Thanks Kevin Click here to see answer by Edwin McCravy(8909)

 Question 455948: (5x-1)(6x+3) I came up with: 5x * 6x * 5x + 3 - 1 * 6x - 1 * 3 I used the foil method, not sure if thats right or what to do from here. Thanks Kevin Click here to see answer by nerdybill(6962)

 Question 456022: How do you solve rational expression using Lowest Common Denominator and cross multiplying? 5/a^2= (-4/a) +1 5 over a squared = (negative 4 over a) plus 1 Click here to see answer by edjones(7569)

 Question 456068: 3/c-4 = c-1/c-4 Please solve that rational equation using cross multiplication and lowest common denominator... I see that c-4 is the common denominator but do you still have to multiply by c-4? Click here to see answer by richwmiller(9143)
 Question 456068: 3/c-4 = c-1/c-4 Please solve that rational equation using cross multiplication and lowest common denominator... I see that c-4 is the common denominator but do you still have to multiply by c-4? Click here to see answer by oberobic(2304)

 Question 456077: Would the LCD here be 2m? a/m - 3/2m = 15/m Click here to see answer by richwmiller(9143)

 Question 456212: Essay; show all work. Bob’s Barber Shop estimates their gross revenue for the second quarter to be given by the polynomial 2x3 – 3x2 + 7x – 1. The shop estimates their costs for that quarter to be given by x2 + 4x + 2. For the second quarter, find and simplify a polynomial that will represent their profit. Click here to see answer by nerdybill(6962)

 Question 456231: n^2-n-20/9-n^2 MUTLIPLY n-3/n-5 If you would help me understand, how to multiply these fractions im drawing a blank. Thank you. Kevin Click here to see answer by stanbon(57387)

 Question 456363: How many terms are in the polynomial abcd + e - h2? Click here to see answer by Alan3354(30993)

 Question 456489: I need help figuring out how to factor out this binomial. Y^8 - 256. Please and thank you,its really stumping me. Click here to see answer by Alan3354(30993)
 Question 456489: I need help figuring out how to factor out this binomial. Y^8 - 256. Please and thank you,its really stumping me. Click here to see answer by tquon(6)

 Question 456589: i need to factor this out the problem is 6a^2+7a-3 and im just getting stuck Click here to see answer by robertb(4012)
 Question 456589: i need to factor this out the problem is 6a^2+7a-3 and im just getting stuck Click here to see answer by edjones(7569)

 Question 456556: We are working on rational expression and equations this week and I am completely lost with the following problem. 1. Divide and simplify b+3/b-9 / 9b+27/b-4 2. Solve the equation and check your answer. q+6/7 + q-2/2=8/7 3. Add. 6/z+3 + 9/7z 4. Subtract. Simplify, if possible. g/s+g - g/s-g These are the last ones I need help with, thank you very much for the help. Click here to see answer by edjones(7569)

 Question 442330: My class is studying polynomials, trinomials, and rational expressions and I need help with this problem. They want me to rewrite this equation with the right side completely factored. This equation is N = -2x^2 + 76x + 430, where x = 0 I don't even know what they want from me, never mind solve it. Can anyone please help me? Thanks. Hi Shree, we as well are doing a similar equation but I am not sure how you arrived at this solution, the steps to get here would be more useful to me than the answer. Thank you. Click here to see answer by miohmeye1(1)

 Question 456706: Is 3 the solution of the equation 5y = 18 ? Click here to see answer by Alan3354(30993)

 Question 456856: how do you solve this rational expression- x^2+2x-24 x^2-36 Click here to see answer by Alan3354(30993)