Collin needs to buy a package of roast beef for $5, a package of Swiss cheese for $3, and a loaf of wheat bread for $4 to make lunch.
Collin has a coupon that gives him x percent off on a package of cheese. He has a second coupon that gives him y percent off on a loaf of bread. He has a third coupon that gives him z percent off on his total purchase.
Collin cannot combine the coupon for the total purchase with the other two coupons. These expressions give both possibilities for the total cost of Collin's purchase after the coupons are applied. The variables represent percentages as decimals.
(1−x) 3 + (1−y) 4 + 5
Which part of the expression represents the price of the roast beef, the Swiss cheese, and the bread before the total discount is applied?