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3 years ago

7 is 28% of what number

Mathematics

2 answers:

zvonat [6]3 years ago

7 0

25 hope it helps have a great day :)

Elis [28]3 years ago

4 0

7 is 28 percent of 25
Hope this helps

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3. From the table below, find Prof. Xin expected value of lateness. (5 points) Lateness P(Lateness) On Time 4/5 1 Hour Late 1/10

wariber [46]

Answer:

The expected value of lateness $\frac{7}{20}$ hours.

Step-by-step explanation:

The probability distribution of lateness is as follows:

Lateness P (Lateness)

On Time 4/5

1 Hour Late 1/10

2 Hours Late 1/20

3 Hours Late 1/20

The formula of expected value of a random variable is:

$E(X)=\sum x\cdot P(X=x)$

Compute the expected value of lateness as follows:

$E(X)=\sum x\cdot P(X=x)$

$=(0\times \frac{4}{5})+(1\times \frac{1}{10})+(2\times \frac{1}{20})+(3\times \frac{1}{20})\\\\=0+\frac{1}{10}+\frac{1}{10}+\frac{3}{20}\\\\=\frac{2+2+3}{20}\\\\=\frac{7}{20}$

Thus, the expected value of lateness $\frac{7}{20}$ hours.

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3 years ago

Tessellations

Oduvanchick [21]

Answer:

B. Lines of symmetry: 1

Step-by-step explanation:

I calculated it logically

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3 years ago

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andreev551 [17]

Answer:

The answer is B :))

Step-by-step explanation:

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3 years ago

What is >>>>> -x<15-2x

Gemiola [76]

$-x$

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3 years ago

Which of the following is NOT a solution to the inequality below? 4x+9>63

Sedbober [7]

Answer:

A. 13

Step-by-step explanation:

When you plug the numbers in, 4 times 13 = 52+9=61 and 63 is still greate so anything above 13 would make the sentence correct. So that is why 13 is NOT a solution.

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2 years ago

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