45%of x=72
45/100 of x=72
9/20 of x=72
x=72*20/9
x=160..............
4 or more apples could be green because if there are 3 or less red then there must be 4-7 green
A^2 + 31 = 155 - I squared each of b and c for those numbers
a^2 = 155 - 31
a^2 = 124
a = 4 * sqrt(31)
Mount everest (Himalayas) and mount elbert (rocky mountains)