Problema Solution
Joe's car gets an average of 28 miles per gallon of gasoline. Gas is currently selling for $3.29 per gallon. Find a function C which gives the cost of driving his car in terms of the number of miles x that he drives. What is the cost of driving his car 300 miles. If Joe spent $300 to drive his car one month, how many miles did he drive that month?
Answer provided by our tutors
On average, how much Joe pays per mile can be written as:
(1 gallon/ 28 miles) ($3.29/gallon)= .1175 $/mile
The cost (C) of driving Joe's car in terms of the number of miles (x) that he drives can be written as:
C= .1175x
Cost of driving Joe's car 300 miles:
C=.1175(300)
C=$35.25
How many miles did Joe drive if he spent $300:
300=.1175x
x=2553.19 miles