Question

Tyree rented a bike for a $4 fee,plus $9 per hour.Tyree spent exactly $31.What is the total number of hours that Tyree rented the bike ?

Answer 1

Tyree has spend 3 hours on the bike.

Explanation:

For starters, he has already paid $4 to ride the bike. For each hour, $9 would be added to the $4; for example:

$4 + $9/hr

$13 after an hour + $9

$22 after 2 hours + $9

$31 after 3 hours.