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4 April, 20:37

A sandwich costs $0.75 more than a container of milk. A customer buys 4 sandwiches and 4 containers of milk. The customer pays $7.00. What is the cost of a sandwich? Enter your answer in the box.

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  1. 4 April, 22:24
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    Assume that the cost of the milk is x.

    We are given that a sandwich costs 0.75$ more than the cost of milk. This means that:

    cost of sandwich = cost of milk + 0.75

    cost of sandwich = x + 0.75

    Now, the customer bought 4 sandwiches and 4 containers of milk at the cost of 7$.

    We will transform this into an equation as follows:

    total cost = cost of 4 sandwiches + cost of 4 containers of milk

    7 = 4 (x+0.75) + 4 (x)

    Solve the above equation to get x as follows:

    7 = 4x + 3 + 4x

    7-3 = 8x

    8x = 4

    x = 0.5

    Therefore:

    cost of milk = x = $0.5

    cost of sandwich = x+0.75 = 0.5+0.75 = $1.25
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