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11 September, 19:33

Which strategy best explains how to solve this problem? Rebecca bought a meal and two snacks for lunch each day. The meal cost $5.50 and the snacks cost $0.75 each. What is the total amount of money Rebecca spent after 12 days? A. Make a table. Write the numbers 1 to 12 in the top row of the table (the number of days). In the first box on the second row, write $7. This is how much Rebecca spends in 1 day. In each of the next boxes in the second row, write the amount Rebecca spends by adding $7 to the previous amount. The answer in box 12 is the total amount Rebecca spent after 12 days. B. Work backward. Start with the price of the two snacks ($1.50). Add the cost of the meal and then divide by 12. C. Guess and test. Guess that Rebecca spent $95. Multiply $0.75 by 2. Then add that answer to $5.50. Divide this number by 95. If the answer is not 12, then revise your guess, and test your answer again.

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  1. 11 September, 19:55
    0
    Given:

    Cost of lunch per day = 1 meal and 2 snacks

    C = 5.5 + 2 (0.75) = 5.5 + 1.5 = 7

    7 * 12 days = 84

    Based on the choices, the best strategy would be:

    A. Make a table. Write the numbers 1 to 12 in the top row of the table (the number of days). In the first box on the second row, write $7. This is how much Rebecca spends in 1 day. In each of the next boxes in the second row, write the amount Rebecca spends by adding $7 to the previous amount. The answer in box 12 is the total amount Rebecca spent after 12 days.
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