Answer:
8d
Step-by-step explanation:
-45x+72
you multiply the 9 by everything in the parentheses
So because there are 4 squares like 4 parts of this figure and just one is shaded so the right answer will be 1/4 what mean 1 from 4 is the shaded part
so choice D. is right
hope this will help you
18 people x 18 walls = 324 minutes