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3 years ago

Joanne buys a rectangle rug with an area of 34/4 square meters the length of the rug was 7/2

Mathematics

1 answer:

Marrrta [24]3 years ago

4 0

Answer:

5/2

Step-by-step explanation:

area formula = l*w=A

in this case l=7/2, and A=35/4

7/2*w=35/4

divide 7/2 with 35/4 to get the value of "w"

35/4*2/7=5/2

hope this helps, if it does plz vote my answer the brainiest, thanks!

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Graph the linear equation

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Answer:

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Step-by-step explanation:

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3 years ago

There are three executives in an office, ages 56, 57, and 58. If a 57-year-old executive enters the room, the

vova2212 [387]

Answer:

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

Number of executives, n = 3

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

Mean = 57

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

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

Variance = $\frac{1+0+1}{\textup{2}}$

Variance = 1

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

Variance = $\frac{1+0+1+0}{\textup{3}}$

Variance = 0.67

Hence,

Mean will remain the same and the variance will decrease

Hence,

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

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3 years ago

Factor the polynomial 3x4 – 2x2 + 15x2 - 10 by grouping.

prohojiy [21]

Answer:

see explanation

Step-by-step explanation:

Given

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