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2 years ago

I need help plz I do not really understand this if you can help me I’d highly appreciate

Mathematics

1 answer:

svlad2 [7]2 years ago

5 0

Answer:

Angle YXW=Angle VXZ that is 36.6°

Step-by-step explanation:

Vertically opposite angles are equal.

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Scores on an english test are normally distributed with a mean of 31.5 and a standard deviation of 7.3. find the score that sepa

kobusy [5.1K]

Let X be the score on an english test which is normally distributed with mean of 31.5 and standard deviation of 7.3

μ = 31.5 and σ =7.3

Here we have to find score that separates the top 59% from the bottom 41%

So basically we have to find here x value such that area above it is 59% and below it is 49%

This is same as finding z score such that probability below z score is 0.49 and above probability is 0.59

P(Z < z) = 0.49

Using excel function to find the z score for probability 0.49 we get

z = NORM.S.INV(0.49)

z = -0.025

It means for z score -0.025 area below it is 41% and above it is 59%

Now we will convert this z score into x value using given mean and standard deviation

x = (z* standard deviation) + mean

x = (-0.025 * 7.3) + 31.5

x = 31.6825 ~ 31.68

The score that separates the top 59% from the bottom 41% is 31.68

3 0

3 years ago

Can someone help me on this please

Firlakuza [10]

The choices :

Three

B , E , D

6 0

3 years ago

The sum of three numbers is 254.772. We can get the biggest and smallest numbers if we move the decimal point in the middle numb

gayaneshka [121]

Use photo math it helps you with the questions

8 0

2 years ago

I need help with this question plzzz Geometry

KATRIN_1 [288]

Answer:

If the perimeter of a square measures 32 cm, each side measures 32/4= 8 cm, because all sides are equal.
The diagonal that passes through the center of the square divides the square into two triangles. The triangles are formed by a hypotenuse (the diagonal, which is k in this case), and two sides, that measure 8 cm each, in this case.
Because of Pythagoras' theorem, we know that the lenght of the hypotenuse (in this case the hypotenuse is k) equals the squared root of the sum of the squared sides, which in this case can be expressed as $k=\sqrt{8^2+8^2} =\sqrt{64+64}=\sqrt{128}=11.31$ .
Then, k=11.31 cm.

3 0

3 years ago

Find the product of 27×6×60 then explain how you would use mental math to find the product of 27×600

Ne4ueva [31]

27x6x60=9,720 *You can use mental math by multiplying 27 by 6 and adding the 2 zeros to the end of the product*

7 0

2 years ago