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4 years ago

6

I don't understand this question on Systems of Equations unit. (Algebra 1) It says "A farmhouse shelters 11 animals. Some are go

ats and some are ducks. Altogether there are 34 legs. How many of each animal are there?"

1 answer:

Helen [10]4 years ago

8 0

The answer is 6 goats and 5 ducks

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Answer:

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$\sum_{n=0}^9cos(\frac{\pi n}{2})=\frac{1}{2}(\sum_{n=0}^9 (e^{\frac{i\pi n}{2}}+ e^{\frac{i\pi n}{2}}))$

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What we use?

We use that

$e^{i\pi n}=cos(\pi n)+i sin(\pi n)$

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