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Mathematics

1 answer:

Umnica [9.8K]3 years ago

5 0

Answer:

The answer is 5

Step-by-step explanation:

You divide 25 by the number that you multiply twice which would be 5 bc 5*5=25.

25/5=5

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A test consists of 100 multiple choice questions, each with five possible answers, only one of which is correct. Find the mean a

TEA [102]

Answer: Mean = 20 and standard deviation = 4

Step-by-step explanation:

Let x represents the success of getting the correct answer.

Here, the total number of trials(n) = 100

The probability of getting the correct answer, p = 1/5

Thus, the mean of the number of correct answer,

$\mu_x= np$

$\mu_x= 100\times 1/5$

$\mu_x= 20$

Now, the standard deviation, $\sigma_x= \sqrt{n\times p\times (1-p)}$

$\sigma_x= \sqrt{100\times 1/5\times 4/5}$

$\sigma_x= \sqrt{16}$

$\sigma_x= 4$

Thus, First option is correct.

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4 years ago

You asked your classmates to name their favorite type of music. You found that 12 students like rock, 8 like rap, 6 like R&B

SSSSS [86.1K]

First we should write the total numbers:
12+8+6+4=30
then we should divide the number 30 by 360(because the pie chart is 360 degrees):
$360 \div 30 = 12$

now we should multiply 12(the number of students who likes rock) by 12
$12 \times 12 = 144$
the answer is 144 degrees

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3 years ago

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Nookie1986 [14]

The carrot patch is a 2 by 5 rectangle so 2 times 5 is 10 so the answer is A

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3 years ago

Solve for h. P=mgh Answer choices: H=P-mg H=pg/m H=p/mg H=P+mg

rosijanka [135]

P=mgh
p/mg=h

the answer is:
H=p/mg

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3 years ago