Answer:
he needs 165 square feet to purchase
Explanation:
its says half of the back yard witch is 20 length and 30 width if you divide 20÷2=10 and 30÷2=15 10+15=25 that's the backyard in the front if you do 80+60=140 feet than you do 140+25=165 feet now that's what you get for your answer