let x feet be the highest of the boxes , and y be the number of boxes.
the answer is coming as 15 feet for 20 boxes and 12 boxes to reach the ceiling of 9 feet high
3.5x-10>-3 add 10 to both sides
3.5x>7 divide both sides by 3.5
x>2
... now for the other inequality:
8x-9<39 add 9 to both sides
8x<48 divide both sides by 3
x<6
So we have x>2 and x<6, so the compound inequality is:
2<x<6 and this means that the solution set is:
x=(2, 6)
This is a rate*unit problem.
So, 4 calories per pound x 151 pounds

He will burn 604 calories in one hour
Step-by-step explanation:
8(b+1)=-3(2+b)
8b+8=-6-3b
8b +3b = -6-8
11b = -14
b = -14/11