What do you need help with? Just lmk
Ur output value is f(x).....so to do this problem u need to sub in 2/3 for f(x) and solve for the input value which is x
f(x) = -1/3x + 7
2/3 = -1/3x + 7 ...multiply everything by 3
2 = -x + 21
2 - 21 = - x
- 19 = -x
19 = x <== ur output
1. 112 degrees
2. 68 degrees
V = l * w * h
240 = 20* h
divide both sides by 20
12 = h
height = 12 inches
