Khadija went to the store to buy some apples. The price per pound of the apples is $7.50 per pound and she has a coupon for $1.75 off the final amount. With the coupon, how much would Khadija have to pay to buy 4 pounds of apples? Also, write an expression for the cost to buy p pounds of apples, assuming at least one pound is purchased.
Final cost of 4 pounds:
Final cost of p pounds:
Final cost of 4 pounds: $7.50 x 4 = $<<7.5*4=30>>30
With the coupon, Khadija would have to pay $30 - $1.75 = $<<30-1.75=28.25>>28.25 to buy 4 pounds of apples.
Expression for the cost to buy p pounds: $7.50p - $1.75, where p represents the number of pounds of apples.