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8 September, 05:31

Which calculations could be used to solve this problem?

There are 21 children at Corie's party. There are 2 times as many girls as boys at the party.

How many girls are at the party?

Choose all answers that are correct.

A.

Multiply 21 * 2. Divide the product by 3.

B.

Add 21 + 2. Divide the sum by 3.

C.

Divide 21 : 3. Subtract the quotient from 21.

D.

Divide 21 : 3. Multiply the quotient by 2.

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Answers (1)
  1. 8 September, 07:39
    0
    Given:

    total of 21 children

    2 times as many girls as boys at the party.

    Let x be the number of boys.

    boy + girls = 21

    x + 2x = 21

    3x = 21

    x = 21/3

    x = 7 number of boys

    2x = 2 (7) = 14 number of girls.

    C. Divide 21 : 3. Subtract the quotient from 21.

    D. Divide 21 : 3. Multiply the quotient by 2.
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