Questions on Algebra: Expressions involving variables, substitution answered by real tutors!

Tutors Answer Your Questions about Expressions-with-variables (FREE)

Question 465511: can you help solve thi with all steps
(x^2-1)/(x+1)
=x-1
Click here to see answer by robertb(4012)

Question 465741: can you help me with this problem
factor out the largest common factor
24x9y7-18x5y5-54x3y3

Click here to see answer by sofiyac(695)

Question 466115: I have a word problem that I do not know howto set up the equation?!
A hot tub can be filled by one pipe in 15 minutes and by a second pipe in 10 minutes. How long will it take to fill the hot tub, if they are using both pipes?
Click here to see answer by sofiyac(695)

Question 466153: Dear Algebra Gods...
Can you please help me?
Rewrite the following expression with positive exponents:
(26xy)^-6/7
Click here to see answer by stanbon(57377)

Question 466179: Can anyone help me with this?
Identify the degree of each terms of the polynomial and the degree of the polynomial?
-3x^3+8x^2+6x+7
Thank you!
Click here to see answer by stanbon(57377)

Question 466221: (5)/(y-4) - (8)/(y-4)= (2)/(y^2-16)
5 over y-4 minus 8 over y-4 = 2 over y squared-16
Click here to see answer by Gogonati(809)

Question 466372: Can't figure how to set this up!!??
Practically blind without my glasses, I can only see shapes in the barnyard. Despite that, I count 46 legs, but only 14 heads in a farm yard of sheep and geese. How many of each are there?
Click here to see answer by stanbon(57377)

Question 466371: Find the measure of an angle such that twice the measure of its compliment is 16 more than the difference between the measures of its supplement and its compliment
Click here to see answer by Math-Help(7)

Question 466442: write the equation and solve
12 subtracted from 3 times a number is 15
equation-
solution-
Click here to see answer by jorel1380(2518)

Question 466441: 4e-19=-3 (e+4)
Click here to see answer by Scorinitron(19)

Question 466441: 4e-19=-3 (e+4)
Click here to see answer by ccs2011(207)

Question 466523: Bob is 5 times the age of his daughter Jane. In 5 years time, Bob will be 3 times Jane's age. How old are they now?
Click here to see answer by Earlsdon(6287)

Question 466662: The solution for 4x-9y=10.5 and 7x-2x=6.5
Click here to see answer by mananth(12270)

Question 466737: I have a couple problems I need help with. I did the first one, I just am having a hard time with the second one. Please help me :)
a) 2(y-1)^2 = 4(y+1)^2

b) x/3 - x/12 = -4
Click here to see answer by stanbon(57377)

Question 466739: I have done the first one, but I have a feeling it is incorrect. If by chance someone could help me out please!! :) Id really appreciate it!!!
--Solve each system by elimination--
a) x-y=3
x+3y=3
b) -x+3y=6
x-9y=9
Click here to see answer by stanbon(57377)

Question 466813: Hello,
What would be the formula for solving this problem?
mn/4 - y = f; solve for n
Thank you
Click here to see answer by stanbon(57377)

Question 466835: Hello,
I have a question on solving linear equations.
-1/4(x-12) + 1/2(x+2) = x + 4
Solve for x
I tried this many times and came across a solution which does not equal each sides of the equation. Please provide some assistance.
Thank you
Click here to see answer by Ryan O'Hara(46)

Question 466836: Hello,
I have a question on solving linear equations. Please adivse with a solution to this problem.
1/9(p + 18) + 1/3(2p + 3) = p + 3
I tried this several time but get the wrong answer.
Thank you
Click here to see answer by rfer(12662)

Question 466838: Hello,
What would be the correct solution to this problem on solving linear equations?
2/3k - (k - 1/2) = 1/6(k - 5)
Thank you
Click here to see answer by stanbon(57377)

Question 466838: Hello,
What would be the correct solution to this problem on solving linear equations?
2/3k - (k - 1/2) = 1/6(k - 5)
Thank you
Click here to see answer by Ryan O'Hara(46)

Question 466838: Hello,
What would be the correct solution to this problem on solving linear equations?
2/3k - (k - 1/2) = 1/6(k - 5)
Thank you
Click here to see answer by rfer(12662)

Question 466839: Hello,
I attempted solving a problem on linear equations but I do not understand the formula. Please help with this problem.
-5/6q - (q-1) = 1/4(-q + 80)
Thank you
Click here to see answer by Ryan O'Hara(46)

Question 466840: Hello,
I have a question on solving linear equations. What would be the solution to this problem?
0.92x + 0.98(12-x) = 0.96(12)
Thank you
Click here to see answer by Ryan O'Hara(46)

Question 467005: Simplify. Do not use negative exponents in the answer.
x^7/x^-2

Click here to see answer by Alan3354(30993)

Question 467067: 13-3z=
The answer is 31 over 2. I am not figuring out how the answer was reached, please help with steps.
Click here to see answer by rfer(12662)

Question 467095: Hello,
I have a question on solving formulas for variables.
What are the steps for solving this problem.
x/5 + 5y = m/n; solve for y
Thank you
Click here to see answer by Theo(3464)

Question 467246: 5c=28+c
Click here to see answer by Big Poop(157)

Question 467329: newman invested a certain amount of money at 10% interest and $250 more than that amount at 12%. his total yearly interest was $52.00 . how much did he in vest at the 10% rate
Click here to see answer by jorel1380(2518)

Question 467331: two trains leave the same station at the same time, one traveling east and the other traveling west. at the end of 3 hours they are 216 miles apart. if the rate of the train traveling east is 12 miles per hour faster than the rate of the other train, find their rate.
Click here to see answer by jorel1380(2518)

Question 467390: 15+b=24
Click here to see answer by jim_thompson5910(28595)

Question 467400: Universal set= {1,2,3,4,5,6,7,8}
Set A = {1,2,4,5,8}
Set B= {2,3,4,6,}
Solve: A union B'
Click here to see answer by jim_thompson5910(28595)

Question 467582: Hi,
You guys are the best helpers! I asked a couple question yesterday and the answer I got back I couldn't see any of them. I am taking an online Math class. My final is 200 questions. I did most of it but there were just a couple I am not getting and my ebook wont open.
1. Simplify the expression.
square root -128 square root -16
2. Simplify and express in terms if i
square root -144
(I can't even find anything in my book that talks about i in this chapeter)
3.Add the complex expressions, and simplify.
(1.9 – 7i) + (4.2 – 2.3i)
4.Multiply the expressions, and simplify.
(2x^-4y^-4) · (-7x^4y^-2)
5.Short Answer: Simplify the following expression, and rewrite it in an equivalent form with positive exponents.
(6x^-1)^-2
6.Raise the quantity in parentheses to the indicated exponent, and simplify the resulting expression.
(-2x^9y^4)^4
Thank you so much for your help. This math class is killing me!
:)

Click here to see answer by sudhanshu_kmr(1152)

Question 467607: In a triangle ABC, angle B is 5 times angle a and angle c is 11 degrees less than 4 times angel a

Click here to see answer by jorel1380(2518)

Question 467686: 3/4(2y-6)=y-7
Click here to see answer by ewatrrr(10682)

Question 467820: Does the equation 3(x-1)+5=15x+7-4-4(3x+1)+3 has infinitely many solutions, one solution, or no solution?
Click here to see answer by rfer(12662)

Question 467988: The eighth grade class has 75 students. the number of girls is 6 less than twice the boys.
Click here to see answer by ewatrrr(10682)

Question 468013: How do you solve a question with a negative variable, if the variable itself has a minus sign? Ex:
-abc when a=(-1)
Click here to see answer by Alan3354(30993)

Question 468013: How do you solve a question with a negative variable, if the variable itself has a minus sign? Ex:
-abc when a=(-1)
Click here to see answer by ewatrrr(10682)

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