Algebra questions!! ten points to best answer!!

Simplify the following, showing ALL steps.

1.
3(-4) + 2(3) over 6-3=



2.
|-7 + 5(6 over 5)=


Use the distributive property to simplify each expression below. Show ALL your steps.

3.
-2(x +1)=


4.
1 over 2(x-4)=

5.
2x(3-4y)=

Simplify by combining like terms. Show your steps where needed.

6. 9a+2b - 2(a-1)=


Find the numerical value of each expression below if a=(-2); b=7; x=10; y= -4.
Show your steps.

7.
2ab=


8.
xy over a2= (the 2 is little)



9.
2a+5b-3y=


TEN POINTS TO BEST ANSWER!! only if u show all steps!!!!!!!!!!

1)
=3(-4) + 2(3) / 6-3
=-12 + 6 / -3
=-6/-3
=2
2)
=-7 + 5(6/5)
Cutting 5 from numerator and denominator
=-7 + 6
=-1
3)
0=-2(x+1)
0=-2x-2
2=-2x
x=2/-2 ==>x=-1
4)
=1/2(x-4)
If,
0=1/2(x-4) than solution isn't possible as x will be eliminated by multiplication with 0
If not,
1/2x-8 is answer
5)
2x(3-4y)=0
6x-8xy=0
6x=8xy
1=8xy/6x
1=4y/3
3=4y ==> y=3/4
6)
9a + 2b - 2(a-1)=0
9a + 2b - 2a + 2=0
7a = -2b-2
7a = -2(b+1)
a = {-2(b+1)}/7

For a=-2, b=7 x=10 and y=-4

7)
2ab=2(-2)(7)
2ab=-28
8)
xy/a^2=10*-4/(-2)^2
xy/a^2=-40/4
xy/a^2=-10
9)
2a+5b-3y=2(-2)+5(7)-3(-4)
2a+5b-3y=-4+35+12
2a+5b-3y=47-4
2a+5b-3y=43