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oee [108]
3 years ago
7

The principle of Park Middle School counted all the students in the seventh grade. She found that the ratio of boys to girls was

4:3.
There were 42 girls in the seventh grade. How many boys were in the seventh grade?
Mathematics
1 answer:
LenaWriter [7]3 years ago
3 0

Answer:

68

Step-by-step explanation: 14 '/. 4=26 and 42+26=68

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Step-by-step explanation:

Given expression:

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Apply radical rule \sf \sqrt{a \cdot b}=\sqrt{a}\sqrt{b}

\sf \implies \dfrac{3-\sqrt{16}\sqrt{2}}{1+\sqrt{2} }

As \sf \sqrt{16}=4:

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Multiply by the conjugate:

\sf \implies \dfrac{3-4\sqrt{2}}{1+\sqrt{2} } \times \dfrac{1-\sqrt{2} }{1-\sqrt{2} }

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\sf \implies -11+7\sqrt{2}

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