Question

At a local corner store, the cost of a bag of trail mix at the corner store is $1.35, and the cost of a banana is $1.50. What would it cost to get 7 bags of trail mix and 4 bananas? What would it cost to get x � x bags of trail mix and y � y bananas?

Answer 1

• $15.45
• 1.35x +1.50y

Explanation:

You want to know the costs of different purchases of trail mix for $1.35 per bag and bananas for $1.50 each.

• 7 bags trail mix + 4 bananas
• x bags of trail mix + y bananas

Purchase cost

The cost of a purchase is the sum of the products of the number of items and their cost.

1.

7 bags of trail mix and 4 bananas will cost ...

7·$1.35 +4·$1.50 = $15.45 . . . . cost of the first purchase

2.

x bags of trail mix and y bananas will cost ...

1.35x +1.50y . . . . dollar cost of the second purchase

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