Answer:
7980
Step-by-step explanation:
900+80+7000=7980
It is c because 8x2=16 and 8x4=32 and so on
The Answer Is 57.92 But the easiest way to do it is Rounding it
All of them are wrong its 91 but if you want click or circle 90
Hi there!

Work out the parenthesis.

Combine like terms.

Subtract 9 from both sides.

Subtract 4x from both sides

Divide both sides by -9