On a recent trip to the convenience store, you picked up 3 gallons of milk, 4 bottles of water, and 8 snack-size bags of chips. your total bill (before tax) was $21.30. if a bottle of water costs twice as much as a bag of chips, and a gallon of milk costs $1.60 more than a bottle of water, how much does each item cost?

Question

Donavan Anderson

Mathematics

15 May, 00:44

On a recent trip to the convenience store, you picked up 3 gallons of milk, 4 bottles of water, and 8 snack-size bags of chips. your total bill (before tax) was $21.30. if a bottle of water costs twice as much as a bag of chips, and a gallon of milk costs $1.60 more than a bottle of water, how much does each item cost?

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Answers (1)

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Jamiya Duke · Answer 1

To find the answer you will write and equation in terms of the cost of a bag of chips.

3 (cost of milk) + 4 (cost of water) + 8 (cost of bag of chips) = $21.30

3 (2c + 1.60) + 4 (2c) + 8 (c) = $21.30; Simplify

6c + 4.80 + 8c + 8c = 21.30

22c + 4.80 = 21.30

- 4.80 - 4.80

22c = $16.50

22 22

c = 0.75

The chips cost $0.75 each.

The milk costs (2 x $0.75 + $1.60) $3.10 each.

The water costs (2 x $0.75) $1.50 each.