5.) 72(x - 10)=
6.) x( x-8)=
7.) -(-3y +9)=
8.) -(a + b - c)=
I
Help me?

are you expanding it??.. if so...

Step-by-step explanation:

5. 7x-720

6. x^2 - 8x

7. 3(y-3)

8. -a-b+c

1.4

2.3

step-by-step explanation:

the formula for the constant of variation is

y= kx

divide each side by x

y/x =kx/x

y/x =k

we know a and y

1.   y/x = k

4/1 =4

check the other values to make sure they are the same

8/2 = 4   12/3 =4   and 16/4 =4  

the constant of variation is 4

2.   y/x = k

3/1 =3

check the other values to make sure they are the same

6/2 = 3   9/3 =3   and 12/4 =3  

the constant of variation is 3

it’s supposed to be -4+45=41

step-by-step explanation: