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7-78.
  1. Multiple Choice: The cost of a sweater is $3 less than the cost of a pair of jeans, while a hat is twice the cost of a sweater. If the pair of jeans costs j dollars, then which expression below represents the cost of the hat? Homework Help ✎

    1. 2j

    2. j − 3

    3. 2(j − 3)

    4. 2j − 3

First find the cost of a sweater using the variable j.

Sweater = j − 3

Using that information, can you find the price of the hat?

Hat = 2(j − 3), (c)