Matt earns $9.00 per hour mowing lawns and $8.50 per hour gardening. Last week he worked h hours mowing lawns and three times as many hours gardening. Write and simply an expression to show the amount of money Matt earned last week.

Step-by-step explanation:

Last week he worked h hours mowing lawns and three times as many hours gardening. This means that the number of hours he worked, gardening is 3h.

Matt earns $9.00 per hour mowing lawns and $8.50 per hour gardening. Therefore, an expression to show the amount of money Matt earned last week is

(9 * h) + (8.5 * 3h)

= 9h + 25.5h

= 34.5h