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4 years ago

11

The ratio of girls to boys in French class is 5:4. There are 12 boys in the class. How many girls are there?

2 answers:

jolli1 [7]4 years ago

8 0

Answer:

15

Step-by-step explanation:

5/4=15/12

Svet_ta [14]4 years ago

7 0

Answer:

15 girls

Step-by-step explanation:

G : B : total

5 : 4 : 9

? :12: ?

No. of girls = (12x5)/4 = 15 girls

we put the ratio between girls and boys then we add the (total) or(sum) beside them in the same ratio then the summation of the ratio, like (5 +4 = 9) and then under the word "boys" we put the number given in the question which is (12) , now we need to know the number of girls in the class so we use the cross multiplication which i wrote at first.

by that, you can calculate no. of girls and no. of students in the whole class if you want.

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Step-by-step explanation:

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Using fraction rule $\frac{a}{-b} =-\frac{a}{b}$ we can write our expression as: $-\frac{10x^{6}y^{12}}{5x^{-2}y^{-6}}$ .

Upon dividing 10 by 5 we will get,

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Upon using exponent property for quotient $(\frac{a^{m}}{a^{n}} =a^{(m-n)})$ we will get,

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