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10 January, 14:45

Danica is arranging flowers for a party. On each table, t, there will be a vase of 9 flowers and 3 bowls of flowers with f flowers inside. Danica needs an additional 12 flowers for a cake topper. This situation can be written as the following expression:

9t + (3f) t + 12

How many flowers should Danica purchase if she has 21 tables with 3 flowers in each bowl?

69

189

378

390

+2
Answers (1)
  1. 10 January, 14:51
    0
    On this question, we can use the order of operations. (pemdas)

    First, we must fill in the missing numbers.

    9*21 + (3*3) 21 + 12

    Start in the parentheses.

    (3*3) 21 = 9*21 = 189

    189+189+12

    The rest is just addition now!

    189+189+12=390

    390 is the correct answer.
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