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3 years ago

Evaluate 5m for m = 3

Mathematics

2 answers:

mrs_skeptik [129]3 years ago

6 0

thae answer to problem is

5(m)

5(3)

15 this is your answer

have a nice day

velikii [3]3 years ago

4 0

15 is your answer as its 5*3

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Scores on a test are normally distributed with a mean of 81.2 and a standard deviation of 3.6. What is the probability of a rand

Misha Larkins [42]

<u>Answer:</u>

The probability of a randomly selected student scoring in between 77.6 and 88.4 is 0.8185.

<u>Solution:</u>

Given, Scores on a test are normally distributed with a mean of 81.2

And a standard deviation of 3.6.

We have to find What is the probability of a randomly selected student scoring between 77.6 and 88.4?

For that we are going to subtract probability of getting more than 88.4 from probability of getting more than 77.6

Now probability of getting more than 88.4 = 1 - area of z – score of 88.4

$\mathrm{Now}, \mathrm{z}-\mathrm{score}=\frac{88.4-\mathrm{mean}}{\text {standard deviation}}=\frac{88.4-81.2}{3.6}=\frac{7.2}{3.6}=2$

So, probability of getting more than 88.4 = 1 – area of z- score(2)

= 1 – 0.9772 [using z table values]

= 0.0228.

Now probability of getting more than 77.6 = 1 - area of z – score of 77.6

$\mathrm{Now}, \mathrm{z}-\text { score }=\frac{77.6-\text { mean }}{\text { standard deviation }}=\frac{77.6-81.2}{3.6}=\frac{-3.6}{3.6}=-1$

So, probability of getting more than 77.6 = 1 – area of z- score(-1)

= 1 – 0.1587 [Using z table values]

= 0.8413

Now, probability of getting in between 77.6 and 88.4 = 0.8413 – 0.0228 = 0.8185

Hence, the probability of a randomly selected student getting in between 77.6 and 88.4 is 0.8185.

4 0

3 years ago

I'm thinking of a number. If you multiply it by 5 and then subtract 24, you will get -44. What is my number?

Allushta [10]

Answer:

Step-by-step explanation:

let y = the number

y x 5 - 24 = -44

y x 5 = -44 + 24

y x 5 = 20

y = 20/5

y = 4

5 0

3 years ago

Read 2 more answers

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vfiekz [6]

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2 years ago

Use Pascal's triangle to find the coefficient of the third term in the expansion of (a + b)2.

Alexxandr [17]

Answer:

Step-by-step explanation:

(a+b)^2

using Pascal triangle

1 1

1 2 1

1 3 3 1

so the third term in the expansion of (a+b)^2

we use

1 2 1

a^2 + 2ab+b

hence the coefficient of third term is 1

option B is collect

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3 years ago

Can anyone help me with this??

fredd [130]

7)X=20
8)X=14
9)X=45.83 repeating
10)X=-19
11)X=100
12)X=-25

6 0

3 years ago