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3 years ago

12

Nina has some nickles and 9 pennies in her pocket her friend Maurice has twice as many nickles as Nina together their coins are

worth 84¢ how many nickles does Nina have

1 answer:

kotykmax [81]3 years ago

7 0

I think if we add 34 + 9 + 20 + 21 + is = 84

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kati45 [8]

Answer:

$\pi = \frac{A}{2r^2 + 2rh}$

Step-by-step explanation:

First, we need to isolate $\pi$ by taking it common from both terms on the right:

$A=2\pi r^2 + 2\pi rh\\A=\pi (2r^2 + 2rh)$

Now, since we want $\pi$ in terms of the other variables, we can divide the left hand side (A) by whatever is multiplied with $\pi$ on the right hand side. Then we will have an expression for $\pi$ . Shown below:

$A=\pi (2r^2 + 2rh)\\\pi = \frac{A}{2r^2 + 2rh}$

This is the xpression for $\pi$

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