Canoe rental at howie's canoes costs $5 per hour plus an initial deposit of $15. write an expression for how much it costs to rent a canoe for any number of hours

This solution only needs proper understanding of the word problem and identification of variables.
Let x = number of hours rental of the canoe

It costs $5 per hour for a canoe. However, for every rental of one canoe, there is a deposit of $15 regardless.
The expression is then 5x + 15.

This expression will solve how much it costs in total to rent one canoe for x hours.