Texas Test Prep

Question

Isaac is painting a wall that is 9 feet by 18 feet. So far, he has painted a part of the wall that is a 4 feet by 7 feet rectangle. What is the area of the part of the wall that Isaac has left to paint?

A. 190 square feet

B. 134 square feet

C. 22 square feet

D. 151 square feet

Answer 1

1.  Calculate the total area to be painted, originally

2.  Calculate the total area painted so far

3.  Subtract

4.  THINK! It is to be hoped that you will be able to get a correct answer for more problems by yourself; strive to become self-sufficient because you'll always try to work a problem by yourself.

Answer 2

Hi anais.

 

Multiplying the dimensions of the wall, 18 x 9, will give you the area of the wall. Do the same for the area of the painted part, 7 x 4, then subtract that from the area of the wall.