9 is your answer
because 10times35 is 350 -35 is 315
perimeter is 2L+2W
problem states width = 5L+13
so plug that in for w:
P=2L+2(5L+13)
now simplify
P=2L+10L+26
P=12L+26
Total mass = 6.7134 * 10^-1
= 0.67 grams
<span>V = L,w,h
w = width
w - 2 = height
w + 4 = length
8(w + 4) = V
8(w + 4) = w(w - 2)(w + 4)
Solve for w <span>Answer = -2 </span></span>
