Gabriel went to the store to buy some coffee. The price per pound of the coffee is $4.50 per pound and he has a coupon for $2 off the final amount. With the coupon, how much would Gabriel have to pay to buy 4 pounds of coffee? Also, write an expression for the cost to buy p pounds of coffee, assuming at least one pound is purchased.

Final cost of 4 pounds:
Final cost of p pounds:

1 answer

Final cost of 4 pounds of coffee:

We can calculate the final cost by first finding the total cost before the coupon is applied. The price per pound of coffee is $4.50 per pound, so the total cost without the coupon would be:
4 pounds * $4.50 per pound = $18

Next, we subtract the $2 coupon from the total cost to find the final cost:
$18 - $2 = $16

Therefore, Gabriel would have to pay $16 to buy 4 pounds of coffee with the coupon.

Expression for the cost to buy p pounds of coffee:

Let's call the cost to buy p pounds of coffee "C".

From the given information, we know that the price per pound of coffee is $4.50 per pound, and Gabriel has a $2 coupon. Therefore, the expression for the cost to buy p pounds of coffee, assuming at least one pound is purchased, would be:

C = (p * $4.50) - $2