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STatiana [176]
2 years ago
9

Help please, i will give brainless to who helps me out

Mathematics
2 answers:
yawa3891 [41]2 years ago
7 0
9. x = 30

10. x = 2

11. x = 4

12. x = 2

13. x = -1
Nitella [24]2 years ago
6 0

9. Answer:

30

10. Answer:

2

11. Answer:

4

12. Answer:

4

13. Answer:

-1

<em><u>Tip:</u></em>

Use photomath, its an app

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enot [183]
The 0.25 is the rate of change per each time. the 10 is what it started it
8 0
3 years ago
Please help-many points
kenny6666 [7]

Relatively prime means there are no number greater than 1 that divides them both.

Find the GCF for each set:

A. 68 and 119

68: 1 , 2, 4, 17, 34,68

119: 1, 7, 17

Both numbers can be divided by 1 or 17 so are not relative.

B.

40 and 395

are both divisible by 1 and 5 so are not relative.

C. 119 and 715

Are both only divisible by 1, so are relative.

D. 63 and 56

Are divisible by both 1 and 7 so are not relative.

The answer is C. 119 and 715

7 0
3 years ago
Tom is 4 more than twice Andrews age.Sara is 8 less than 5 times Andrews age. If Tom and Sara are twins,how old is Andrew
Marrrta [24]
Andrew is 4 years old
4 0
3 years ago
7x-x ............................ .
oee [108]

Answer:

6x

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
A department store has daily mean sales of​ $28,372.72. The standard deviation of sales is​ $2000. On​ Tuesday, the store sold​
DiKsa [7]

Answer:

Tuesday z-score was 3.26.

Tuesday was a significantly good day.

Step-by-step explanation:

Problems of normally distributed samples can be solved using the z-score formula.

In a set with mean \mu and standard deviation \sigma, the zscore 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 pvalue, we get the probability that the value of the measure is greater than X.

A score is said to be significantly high if it has a z-score higher than 1.64, that is, it is at least in the 95th percentile.

In this problem, we have that:

\mu = 28372.72, \sigma = 2000

On​ Tuesday, the store sold​ $34,885.21 worth of goods. Find​ Tuesday's ​z-score.

This is Z when X = 34885.21

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

Z = \frac{34885.21 - 28372.72}{2000}

Z = 3.26

Tuesday z-score was 3.26.

Was Tuesday a significantly good​ day?

A z-score of 3.26 has a pvalue of 0.9994. So only 1-0.9994 = 0.0006 = 0.06% of the day are better than Tuesday.

So yes, Tuesday was a significantly good day.

8 0
2 years ago
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