Question

PLEASE HELP!!!!!!!!!!!!!!!!!!!!

Answer 1

option D

Explanation:

in first three options A,B and C the quantities are combining to make 0

whereas,

in option D

the helicopter rises 40 feet, it then rises another 40 feet:

thus the combined quantity will be 80 feet instead of 0

Answer 2

It’s D because adding both times to reach 80, while the other options add # and then subtract the same thing.