89 is the amount of points the team needs to score in the fifth game to average 70 points.
I hope this help
Ok so to solve to first one u do this:
62.4 - 31.53, which gives u 30.87. and then u add 30.87 and 31.33, and u get 62.4
for the second one u do the same thing.
This is what I got I hope it can help you
