Rita makes and sells necklaces. The materials to make each necklace cost $2.75. Last week she made 8 necklaces and wants to make a total profit of $78. Using the equation 8 (x+2.75) = 78, Rita determined that she needs to sell each necklace for $7 to make a total profit of $78. Which error did Rita make?

Question

Arthur Payne

Mathematics

7 August, 00:21

Rita makes and sells necklaces. The materials to make each necklace cost $2.75. Last week she made 8 necklaces and wants to make a total profit of $78. Using the equation 8 (x+2.75) = 78, Rita determined that she needs to sell each necklace for $7 to make a total profit of $78. Which error did Rita make?

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Answers (1)

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Regan Johns · Answer 1

Rita's error is in the sign of 2.75 in her equation. If x is her selling price, Rita needs to find the value of x in

... 8 (x - 2.75) = 78

That value will be

... x = 2.75 + 78/8 = 12.50