Answer:
The cost for full day car rental will be $100.
Explanation:
A bike shop charges x dollars to rent a bike for half a day. It charges (x + 40) dollars to rent a bike for a full day.
On that day the shop made a total of $600 from the bike rentals. If there were 5 half day and 3 full day rental, then we can write
5x + 3(x + 40) = 600
⇒ 8x = 600 - 120
⇒ 8x = 480
⇒ x = $60
Therefore, the cost for full day car rental will be $(x + 40) = $100. (Answer)