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19 June, 15:19

2. A cup of coffee costs $2. If the total cost

IS $18, how many cups of coffee were purchased?

a. Write an equation:

b. What is the constant of proportionality?

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Answers (1)
  1. 19 June, 17:45
    0
    The equation is c=2n

    The constant of proportionality is 2

    $18 will buy 9 cups of coffee

    Step-by-step explanation:

    Cost c=2*n

    where c is the number of cups

    The constant of proportion is 2

    If cost is $18, then

    18 = 2n

    n = 18/2

    n = 9

    $18 will purchase 9 cups of coffee
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