We solve the inequality by subtracting 56.50 from both sides of the equation,
10.45b + 56.50 - 56.50 < 292.67 - 56.50
10.45b < 236.17
Then, divide both sides of the inequality by 10.45
b < 22.6
The solution suggests that the number of boxes than can be loaded on a truck without exceeding the weight limit of the truck should always be lesser than 22.6. Since we are talking about number of boxes, the maximum number of boxes that can be loaded should only be 22.
Equating the two formulas for f, you have
n/12 = f = 3y
Then multiplying by 12 you get
n = 36y
This formula converts yards (y) to inches (n).
I think 90 degrees but not 100 percent sure