During the summer you work 30 hours per week at a gas station and earned $8.75 per hour. you also work as a landscaper for $11 per hour and your work as many hours as you want. you want to earn a total of $400 per week. how many hours mostly work as a landscaper?

A very minimum of 12.5 because 30x8.75= 262.5 and when you subtract that from 400 you get 137.5 and that divided by 11 equals 12.5 

So first we need to find out how much money you earn at the gas station
30 multiplied by 8.75 is $262.50

then subtract that from 400 and you get $137.50

But we need to find how how many hour you need to work to get that much money so you divide that by 11.

You need to work 12 1/2 hours that rounds to 13, so 13 hours total.

Hope this helps!