Hilary earned $17.92 weeding gardens for 3.2 hours. She was paid the same hourly rate to mow lawns. Hilary mowed lawns for 2.75 hours. How much did Hilary earn mowing lawns?

The answer for this problem would be $15.40.

To solve, we know that the hourly lawns is the same as hourly weeding gardens. So, we must find how much money Hilary gets for an hour. To do this, you must divide 17.92 by 3.2 which is 5.60. So, finally, to find how much is 2.75 hours, you multiply 2.75 by 5.6 which is 15.40. Therefore, the answer is $15.40