Question

Suppose that the cost of a truck rental is related to the number of hours the truck is rented by a linear equation. Also, suppose the cost of a 2-hour rental is $55 and the cost of a 3-hour rental is $65. Find the cost of a 6-hour rental.: *

Answer 1

c = m h + b
55 = m (2) + b
65 = m (3) + b
------------------subtract
-10 = -m
m = 10
c = 10 h + b
55 = 20 + b
b = 35
so
c = 10 h + 35
if h = 6
c = 60 + 35 = 95

Answer 2

55 + (10 * 4) = ?