NikkyZ9487
29.09.2019 •
Mathematics
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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Ответ:
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.
Ответ: