Answer:
the answer is 73.5
Step-by-step explanation:
to find the are of the box you have to do the mathematical equation of LxWxH (lengthxwidthxheight) in this case L=6, W=3.5, and H=3.5 so your equation would be 6x3.5x3.5 = 73.5
y=-3x+3
sorry if its wrong im not the best at math.
through my calculations x=8
6x+3y=13
6x+3y-13=13--13
6x+3y-13=0
