D because if you look at all the other ones they are wrong
Answer:
21 minutes divided by 7 walls = 3 minutes per wall for 5 people
Step-by-step explanation:
Assuming each worker has the same exact productivity, one person would take 15 minutes to paint a single wall (3 minutes x 5 people to get the amount of time for 1 worker per wall).
Answer:
-4
Step-by-step explanation:
10+10 = 20
20 x 2= 40
The answer is 40
