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kvv77 [185]
3 years ago
14

I need help this!! Plz help!!

Mathematics
1 answer:
Yuliya22 [10]3 years ago
3 0

12. 360-140=220  x+12=220  x=208

13. 360-8=352  x-47=352   x=399

14. 360-80=280  2x+10=280  x=135

15. 125-64=61  x=61

16. 167-88=79  x=79


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A credit card company decides to study the frequency with which its cardholders charge for items from a certain change of retail
gregori [183]

Answer:

15.87% of the total number of cardholder would be expected to be charging 27 or more in the study.

Step-by-step explanation:

Normal Probability Distribution:

Problems of normal distributions can be solved using the z-score formula.

In a set with mean \mu and standard deviation \sigma, the z-score of a measure X is given by:

Z = \frac{X - \mu}{\sigma}

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the p-value, we get the probability that the value of the measure is greater than X.

Mean of 25 charged purchases and a standard distribution of 2

This means that \mu = 25, \sigma = 2

Proportion above 27

1 subtracted by the pvalue of Z when X = 27. So

Z = \frac{X - \mu}{\sigma}

Z = \frac{27 - 25}{2}

Z = 1

Z = 1 has a pvalue of 0.8413

1 - 0.8413 = 0.1587

Out of the total number of cardholders about how many would you expect are charging 27 or more in the study?

0.1587*100% = 15.87%

15.87% of the total number of cardholder would be expected to be charging 27 or more in the study.

6 0
2 years ago
Find the value of x. A. 53–√ in B. 241−−√ in C. 55–√ in D. 9
castortr0y [4]

Answer:

<h2>x = 5√3 inches</h2>

Step-by-step explanation:

Since the triangle is a right angled triangle we can use Pythagoras theorem to find the missing side x

Using Pythagoras theorem we have

{a}^{2}  =  {b}^{2}  +  {c}^{2}

where a is the hypotenuse

Substitute the values into the above formula

The hypotenuse is 10 inches

We have

{10}^{2}   =  {5}^{2}  +  {x}^{2}

{x}^{2}  =  {10}^{2}  -  {5}^{2}

{x}^{2}  = 100 - 25

{x}^{2}  = 75

We have the final answer as

<h3>x = 5√3 inches</h3>

Hope this helps you

3 0
3 years ago
Of the following points, name all that lie on the same vertical line?
Masteriza [31]

Answer:

(-2,-6) (6,2)

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
JT = 2x + 9,<br> CJ = 6x + 4, and<br> CT = 37,<br> Find JT.
Katyanochek1 [597]

Answer:JT=15

Step-by-step explanation:

3 0
3 years ago
Bob is a realtor who specializes in high-end properties. In an advertising campaign, he wants to point out that his properties a
madreJ [45]

Answer:

D.

Bob should use the mean to make his selling price look like it's the greatest.

8 0
3 years ago
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