Simplify the expression. Write your answers using fractions and/or integers. 47x-10-37x-5

Find the difference.
(12x-4)-(4x-11)

Simplify 110(50m-80)

Simplify -7(x-3)+8

Evaluate the expression when x=9.
-4x+3+5x+4x-5

The number of kid cars that can fit in a parking lot is 10(2x-12),where x is the length of the parking lot in yards.

Write a simplified expression that represents the number of kid cars that can fit in the parking lot.

What is the number of kid cars that can fit in the parking lot that is 12 yards long.

Steps would be appreciated lol.