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2 years ago

WILL NAME BRAINLIEST!!I forgot how to do this over quarantine I guess . . . ;-;

Mathematics

1 answer:

Ymorist [56]2 years ago

8 0

Answer:

x = 37

Step-by-step explanation:

Power Theorem: 10 x (10 + 26) = 8 x (8 + x)

360 = 8 x (8 + x)

8 + x = 45

x = 37

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Expand and simplify (n-2)(3n+7) + 2n(2n+3)

KonstantinChe [14]

3n^2+7n-6n-14+4n^2+6n= 7n^2+7n-14

Hope that helps and best of wishes!

6 0

3 years ago

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

Answer these questions. Whoever is correct will be marked brainlest Number 36 and 37

Firdavs [7]

Answer:

he went 13 units right instead of 12

Step-by-step explanation:

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2 years ago

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It says graph ×< 1 btw

Ymorist [56]

Start at 1 and drag it towards the end of the negative side :)

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2 years ago

Which is harder linear algebra or abstract algebra?

aliina [53]

They both relatively easy depending on how much time you put into understanding but. But if I have to pick which is harder I’d say linear.

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3 years ago

Read 2 more answers

WILL NAME BRAINLIEST!!I forgot how to do this over quarantine I guess . . . ;-;​

WILL NAME BRAINLIEST!!I forgot how to do this over quarantine I guess . . . ;-;