Question

1) If 2 +1/z =0; then what is the value of 9+9z?
A) -9/2
B) -1/2
C) 0
D) 9/2
E) the answer cannot be determined.

2) let wx=y where wxy does not equal 0

If both x and y are multipled by 6, then w is
A)multiplied by 1/36
B)multiples by 1/6
C)multipled by 1
D) multiplied by 6
E) multiples by 36
I got C?

3) if 7x/144 yards and 5/12 feet together equal how many inches?
A) 7x/12+ 5y/4
B)7x/12+5y
C) 7x/4+5y
D) 7x/4 +60
E) 7x+ 5/4y

^i am not sure.

Answer 1

1) so we have 2+1/z=0
subtracting 2:
1/z=-2
multiply by z
1=-2z
divide by -2
-1/2=z

we need 9+9z
9+9(-1/2)
9+(-9/2)
9-9/2
18/2-9/2
=9/2, or D

2) we have wx=y
multiplying x and y by 6 we have
w(6x)=(6y), which is true so you are correct the answer is C

3)there are 36 inches in a yard so we have
7x*36/144=7x/4
there are 12 inches in a foot
5y/12*(12)=5y
the answer is 7x/4+5y, or C