Question

At keller's bike rentals, it costs $28 to rent a bike for 8 hours. how many dollars does it cost per hour of bike use?

Answer 1

8 hours = 28$
to find the cost of 1 h you only need to divide 28 by 8

28 : 8 = 3.5

3.5$

Answer 2

you might want to do a proportion for this problem

`(28)/(x) = (8)/(1)`
28$ is for 8 hours and 'x', which is the unknown number, is for 1 hour. we now have to cross multiply the numbers

`28 * 1`

`8 * x`
this will get you

`28 = 8x`
now we have to divide 8 on both sides to find x.

`(28)/(8) = (8x)/(8)`
your answer will be

`3.5 = x`

so it cost 3.5 $ per hour