It takes 63 minutes for 4 people to paint 9 walls. How many minutes does it take 7 people to paint 4 walls?

  16 minutes

Step-by-step explanation:

The number of minutes is expected to be proportional to the number of walls and inversely proportional to the number of minutes. Relative to the effort given, the number of walls is a factor of 4/9, and the number of people is a factor of 7/4. Hence the number of minutes will be ...

  (63 min)×(4/9)×1/(7/4) = (63 min)×(16/63) = 16 min

It will take 16 minutes for 7 people to paint 4 walls.

don't know what that says sorry i can't you

step-by-step explanation:

idk what it says

the correct answers i think are b. and d.

give me brainliest if it is correct!