Question

On Monday, Janelle earned $16 for 2 hours of babysitting. Getting paid the same rate, she earned $40 for babysitting on Saturday. How many hours did Janelle babysit on Saturday?

Answer 1

Jeanne babysitted for 5 hours.

Explanation:

First, let's see how much she earns per hour.

She earned `$16` for `2` hours, meaning for `1` hour, we do `1/2` of `16`, or `8`.

So she earns `$8` per hour.

Now let's set up a proportion, where `x` equals to the hours Janelle babysitted:
`1/8 = x/40`

Now we solve using cross multiplication, as shown here:

Therefore,
`1 * 40 = 8 * x`

`40 = 8x`

Divide both sides by `color(red)8`:
`40/color(red)8 = (8x)/color(red)8`

`5 = x`

`x = 5`

Jeanne babysitted for 5 hours.

Hope this helps!