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3 years ago

WILL GIVE BRAINLIEST

Mathematics

2 answers:

TiliK225 [7]3 years ago

8 0

Answer:

Option B

Step-by-step explanation:

3 squared equals nine.

-3 squared equals nine. (This is because 2 negatives cancel out in the equation -3 * -3. So, -3 * -3 becomes 3 * 3 = 9)

Both of these equal nine so option B is correct.

irakobra [83]3 years ago

6 0

3^2 is 9 and -3^2 is 9 as well
so the second option

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Let's start out by tripling the original recipe to see how much butter Angie needs.

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So we need $2 \frac{1}{4}$ cups of butter, but Angie only has $1 \frac{5}{8}$ . Let's subtract what Angie has from the total to see how much more she needs.

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we will need the least common denominator for both fractions
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So Angie need $\frac{5}{8}$ cups more of butter for the recipe.

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3 years ago

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klemol [59]

Answer:

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Step-by-step explanation:

The Empirical Rule states that, for a normally distributed random variable:

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Approximately 99.7% of the measures are within 3 standard deviations of the mean.

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Mean of 43.76, standard deviation of 2.67.

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By the Empirical Rule, within 2 standard deviations of the mean. So

43.76 - 2*2.67 = 38.42

43.76 + 2*2.67 = 49.1

Between 38.42 and 49.1.

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