Answer: 56 boxes
Step-by-step explanation: each box is worth 7.5 cubic feet, and if the space is 65% full, the remainder of space, being 420 cubic feet, can hold 56 boxes
Y=mx+c is the slope standard form
5y=-30-4x
5y=-4x-30
Y=-4/5x-6
Substitute the value of y in the equation as -1,
(-1)^2-31(-1)-17 = 1+31-17 = 15
