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3 years ago

Line a pass through (1,-1),and (1,3)

1 answer:

6 0

These two points have the same x coordinate, 1, so it is a vertical line that passes 1 on the x axis,
the equation of the line is x=1

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P divided by 8????? asap nowwww

zlopas [31]

Answer:

I am not sure but if p/8=0 then it is correct

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2 years ago

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Find the area of the figure PLEASE HELP

Bad White [126]

Answer:

I Got You 64 is the correct answer.

Step by-step explanation:

7 x 2= 14

5 x 10= 50

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2 years ago

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1 year ago

Which expression is equivalent to -4 - 9? A. 4 + 9 B. 4 - 9 C. -4 + (-9) D. -4 + 9

musickatia [10]

Answer: C. -4 + (-9)

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2 years ago

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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]

Answer:

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

Solution:

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.

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3 years ago