Question

Marcelo wants to save $300 for a new bike. He earns $9 an hour at her job. Write an expression to show the dollar amount Marcelo still needs to save after working h hours.

Answer 1

To find the dollar amount Marcelo still needs to save after working h hours, we can use the following expression:

Amount still needed = Total cost of the bike - (Earnings per hour * Number of hours worked)

In this case, Marcelo wants to save $300 for a new bike, and he earns $9 per hour at his job. So the expression becomes:

Amount still needed = $300 - ($9 * h)

Let's say Marcelo has already worked for 5 hours. To find out how much more he needs to save, we can substitute h with 5 in the expression:

Amount still needed = $300 - ($9 * 5)

Amount still needed = $300 - $45

Amount still needed = $255

Therefore, Marcelo still needs to save $255 after working for 5 hours