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RideAnS [48]
3 years ago
11

A zoo has 15 Emperor penguins. The Emperor penguins make up 30% of all the penguins at the zoo

Mathematics
1 answer:
Otrada [13]3 years ago
5 0

Answer:

Step-by-step explanation:

there is 15 emperor penguins...they make up 30% of all the penguins

so 30% of all the penguins is 15

let x represent all the penguins

turn ur percent to a decimal

0.30x = 15

x = 15 / 0.30

x = 50 <===== 50 total penguins

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The scores on a psychology exam were normally distributed with a mean of 60 and a standard deviation of 10 . A failing grade on
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Answer:

The cutoff for a failing score was 40,

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7 0
3 years ago
Use matrices and elementary row to solve the following system:
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I assume the first equation is supposed to be

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\left[\begin{array}{ccc|c}5&-3&0&11\\2&-1&0&4\\0&0&1&1\end{array}\right]

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\left[\begin{array}{ccc|c}-1&0&0&-1\\2&-1&0&4\\0&0&1&1\end{array}\right]

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3 years ago
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