Answer:
I got  65
Step-by-step explanation:
The profit will be given as:
P=$15x−$225 Â
(where we subtracted the cost of the mower) so that  P=$750
x will be the required number of needed lawns.
We need to solve:
$750=$15x−$225 Â
rearranging:
x=$750+$225 / Â $15 Â =65 Â lawns