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12 November, 09:13

Mr. Luca would like to purchase a digital

keyboard for each of his 3 nieces and

1 nephew. The keyboard costs $105.

A. Mr. Luca thinks the total cost should

be about $200. Is this amount

reasonable? Explain.

B. Write and solve an equation to find the total cost of the keyboards. Explain why your answer is reasonable.

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Answers (1)
  1. 12 November, 09:40
    0
    A) No it is not reasonable because if you're estimating the cost as

    $100 (per keyboard) x 4 (that he needs to buy) = $400

    4 x $105 = $420

    Or

    (3 + 1) $105 = $420
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