Answer:
it is cheaper for sandy to buy 6pounds of apples, this is because she has to pay $2.75 for 5pounds of apples but she only has to pay $2.50 for 6pounds of apples
Explanation:
if sandy buys 5pounds of apple:
5/3= 1.67
= 1 coupon
the money sandy should pay:
(5*$0.75)-(1*$1)= $2.75
if sandy buys 6pounds of apple:
6/3= 2 coupon
the money sandy should pay:
(6*$0.75)-(2*$1)= $2.50