Posted by kelly on Thursday, August 22, 2013 at 9:38pm.
Solve the system of equations
Perform the indicated operation and simplify (5/(x-2)+(4(x^2-2x)
3.simpify and write with only positive exponents (7x^3y^-2)/(x^-4y^9)^-3
find the solution of the inequality
2x-11 is less than or equal to -4(5x-3)
5. the length of a recangle is 5 feet less than twice the width. the area is 25 square feet. using w as the variable. write an equation that can be used to calculate the width.
Math - kelly, Thursday, August 22, 2013 at 11:12pm
Any help would be appreciated. This is for my study guide in order to do well on my test. Someone please help.
Math - Steve, Friday, August 23, 2013 at 4:52am
From the first, y=3x-11
Plug that into the second:
-5x+3x-11 = 12
-2x = 23
x = -23/2
y = -91/2
Or, you can just add the equations to eliminate the y terms:
-5x = 23
#2 Your parentheses are unbalanced. If you mean
5/(x-2) + 4/(x^2-2x)
5/(x-2) + 4/(x(x-2))
5x/(x(x-2)) + 4/(x(x-2))
(x^-4y^9)^-3 = x^12 y^-27
Since you're dividing by that, you have
Math - Steve, Friday, August 23, 2013 at 4:56am
2x-11 <= -4(5x-3)
2x-11 <= -20x + 12
22x <= 23
x <= 23/22
length is 2w-5
area is 25, so
w(2w-5) = 25
2w^2-5w = 25
2w^2 - 5w - 25 = 0
(2w+5)(w-5) = 0
w=5 (-5/2 is not a usable width)
the rectangle is a square 5x5
Answer This Question
More Related Questions
- college algebra - 1. divide and simplify x^2+x-56/x^1-1 / x-7/2x+2 2. find the ...
- algebra 2 - 1. 5x+2>3x+10 =x>4 2. 8+2x< or equal too 6x-20 x> or ...
- Math - I need help with a few problems. Please help. Perform the indicated ...
- Math - Perform the indicated operation let f(x)=x^2-7x-9 find(a+h)-f(a) and ...
- Algebra help! - 1.) Solve the system by triangularizing the augmented matrix and...
- algebra - how do you do this problem? perform indicated operation write answer ...
- math - 1. Solve for the indicated letter D=4e, for e The solution is e= 2. G(x...
- math - 7. The tennis team is selling key chains as a fundraiser. If its goal is ...
- math - Perform indicated operation and simplify 5/8 + 7/10
- Math - Perform the indicated operation and simplify? (4x)/(x-2)+(8)/(x+2)