Answer:
He would need to mow 7 lawns to buy the discount scooter and 9 without the discount
Explanation:
If he mowed 7 lawns would make $47.25 and 47.25 - 1.05 for gas is 46.20
If he mowed 9 lawns for the non-discounted scooter he would make 60.75 and 60.75 - 1.35 for gas is 59.40