Question: Gnuff charges a flat rate of $20 per tutoring session plus $7 per minute. The total amount paid for Gnuff for tutoring for one session is $146. How many minutes did Gnuff tutor for? Think carefully first, then make a decision:
First find the amount paid just for the per - minute fee, which is $146 - $20 = $126. Then divide that number by the per - minute rate to find the number of minutes: $126 / $7 per minute = 18 minutes. So the answer is 18.