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3 years ago

The expression- 4+[10-(4+2)] Can you explain in words how to solve the expression. PLEASE HELP i am stumped on it.

Mathematics

1 answer:

OleMash [197]3 years ago

4 0

add (4+2) first then subtract that number from 10 so [10-6]. and then add 4. So 4+4

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Step-by-step explanation: 15^2+x^2=22^2

225+x^2=484

x^2=259

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Read 2 more answers

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vova2212 [387]

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option (c) The mean age will stay the same but the variance will decrease

Step-by-step explanation:

Case I: For 3 executives of ages 56, 57 and 58

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Mean = $\frac{\textup{56 + 57 + 58 }}{\textup{3}}$

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Variance = $\frac{(56 - 57)^2+(57-57)^2+(58-57)^2}{\textup{3-1}}$

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For Case II: For 4 executives of ages 56, 57, 58 and 57

Number of executives, n = 4

Mean = $\frac{\textup{56 + 57 + 58 + 57 }}{\textup{4}}$

Mean = 57

Variance = $\frac{\sum{(Data - Mean)^2}}{\textup{n-1}}$

Variance = $\frac{(56 - 57)^2+(57-57)^2+(58-57)^2+(57-57)^2}{\textup{4-1}}$

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Hence,

Mean will remain the same and the variance will decrease

Hence,

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Answer:

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Step-by-step explanation:

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