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kati45 [8]
3 years ago
10

I need help on the Math question?

Mathematics
1 answer:
mrs_skeptik [129]3 years ago
3 0

Answer:

The answer is D.

Step-by-step explanation:

3x*3x = 9x^2

3x*2= 6x

5*3x=15x

5*2=10

6x+15x=21x

9x^2+21x+10

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The ratio of boys to girls in math classes is 3.5. If there are 130 girls in these classes, how many boys must there be?
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Answer:

<h3><u>Required Answer</u><u>:</u><u>-</u></h3>

The ratio of boys and girls =3:5

Let

Number of boys=3x

Number of girls =5x

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{:}\longrightarrow\sf 5x=130

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{:}\longrightarrow\sf x={\dfrac {130}{5}}

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<h3>Now </h3>

The number of boys=3x

=3×26=78

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