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umka21 [38]
3 years ago
9

Consider a set of 7500 scores on a national test whose score is known to be distributed normally with a mean of 510 and a standa

rd deviation of 85. About how many scores greater than 600 would we expect to find?
Mathematics
1 answer:
german3 years ago
5 0
\mathbb P(X>600)=\mathbb P\left(\dfrac{X-510}{85}>\dfrac{600-510}{85}\right)=\mathbb P(Z>1.059)\approx0.145

So approximately 14.5% of the scores are higher than 600. This means in a sample of 7500, one could expect to see 0.145\times7500\approx10.86 scores above 600.
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Geometry, Need help with this question
ExtremeBDS [4]

Answer:

AAS

Step-by-step explanation:

First, write down the given.

1. ∠V≅∠Y - Given

Since line WZ bisects ∠YWZ, which in other words splits it in half, that means that

2. ∠VWZ ≅ ∠YWZ - angle bisector

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Making the theorem AAS

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2 years ago
Carmen is writing an article for a magazine. She will be paid a fee and also will be paid for each word that is published. The t
enot [183]

Answer:

The inverse function of f(x)=2.5*x+150 is f⁻¹(x)=\frac{2}{5}x-60

Step-by-step explanation:

An inverse or reciprocal function of f (x) is called another function f ⁻¹(x) that fulfills that:

If f(a)=b then f⁻¹(b)=a

That is, inverse functions are functions that do the "opposite" of each other. For example, if the function f (x) converts a to b, then the inverse must convert b to a.

To construct or calculate the inverse function of any function, you must  follow the steps below:

Since f (x) or y is a function that depends on x, the variable x is solved as a function of the variable y. And since inverse functions swap the input and output values ​​(that is, if f (x) = y then f⁻¹(y) = x), then the variables are swapped and write the inverse as a function.

You know that he function f(x) = 2.5*x + 150 or y=2.5*x +150

Solving for x:

2.5*x +150=y

2.5*x= y-150

x=\frac{y-150}{2.5}

x=\frac{y}{2.5}-\frac{150}{2.5}

x=0.4y-60=\frac{2}{5}y-60

Exchanging the variable, you obtain that <u><em>the inverse function of f(x)=2.5*x+150 is f⁻¹(x)=</em></u>\frac{2}{5}x-60<u><em></em></u>

7 0
3 years ago
How many grams are there in 4.5 kilograms
zavuch27 [327]

Answer: 4500 grams

Step-by-step explanation: 1 kilogram is 1,000 grams, so 4 kilograms is 4,000 grams, and half a kilogram is 500 grams. So, 4000 + 500 = 4,500

3 0
3 years ago
Read 2 more answers
mrs long drive from nashville tennessee to atlanta georgia at an average rate of 50 miles per hour. The following equation can b
Scrat [10]

50t = 250 \\ t =  \dfrac{250}{50}  \\ t = 5

Answer is C. 5

Hope this helps. - M
5 0
3 years ago
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Eight less than a number is six more than twice the same number.<br> I need the number.
mariarad [96]
The answer is -14


Explanation:

x - 8 = 2x + 6

We move all term to the left

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We add all the numbers together, and all the variables

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We move all terms containing x to the left, all other term to the right

-x = 14
x = 14/-1
x = -14

6 0
3 years ago
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