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PtichkaEL [24]
3 years ago
11

each of the 26 and students and Carrie's class chose either drums or horns to play during music class. If 4 more students chose

drums than horns, how many choose each
Mathematics
1 answer:
Sladkaya [172]3 years ago
7 0
Okay, so here's the equation:
n + (n + 4) = 26
2n = 22
n = 11
So 11 people have horns, but 15 people have drums.
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Answer:

The answer is below

Step-by-step explanation:

We need to prove that:

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\frac{\sqrt{secA-1} }{\sqrt{secA+1} } +\frac{\sqrt{secA+1} }{\sqrt{secA-1} } =\frac{(\sqrt{secA-1)}(\sqrt{secA-1})+(\sqrt{secA+1)}(\sqrt{secA+1}) }{(\sqrt{secA+1})(\sqrt{secA-1}) } \\\\=\frac{secA-1+(secA+1)}{\sqrt{sec^2A-secA+secA-1} } \\\\=\frac{2secA}{\sqrt{sec^2A-1} } \\\\=\frac{2secA}{\sqrt{tan^2A} } \\\\=\frac{2secA}{tanA} \\\\=\frac{2*\frac{1}{cosA} }{\frac{sinA}{cosA} }\\\\= 2*\frac{1}{cosA}*\frac{cosA}{sinA}\\\\=2*\frac{1}{sinAA}\\\\=2cosecA

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3 years ago
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sasho [114]
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6 0
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Step-by-step explanation:

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Step-by-step explanation:

3 0
3 years ago
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svet-max [94.6K]

Answer:

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Step-by-step explanation:

Given as ;

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3 0
3 years ago
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