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Nostrana [21]
3 years ago
10

My question is, with this type of question, are you supposed to use subtraction instead of addition? Just asking because I had a

problem where it said 5(x+7) and my answer was 5x+35 *your writing equivalent expressions* and it used addition, which is why I added the sums of 5•x plus 5•7 which was 5x and 35. But I just wanna know if I use addition or subtraction for this problem, 3y(4-2y)

Mathematics
2 answers:
julia-pushkina [17]3 years ago
6 0

The answer to the one on the paper is -6y • (y - 2)

sergeinik [125]3 years ago
5 0

Im pretty sure you use addition? I may be wrong

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Mars2501 [29]

1/2 of 20 is 20/2 which is 10.

All you really need to do here is to divide 20 by 2 to get 10.


6 0
3 years ago
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The d/f b/n the maximum and minimum value is called______<br> Answer it ik its easy
klasskru [66]

Answer

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Step-by-step explanation:

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2 years ago
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Three potential employees took an aptitude test. Each person took a different version of the test. The scores are reported below
emmasim [6.3K]

Answer:

Tera had the higher z-score, so she should be offered the job.

Step-by-step explanation:

Z- score:

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.

In this problem:

Whoever has the higher z-score should get the job.

Brittany:

Scored 88.3, mean 63.1, standard deviation 14. So

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

Z = \frac{88.3 - 63.1}{14}

Z = 1.8

Alissa:

Scored 236.5, mean 219, standard deviation 25. So

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

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Tera:

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

Z = \frac{7.75 - 6.66}{0.5}

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3 0
3 years ago
Mr. Wells to tell his class of 24 that when they have completed the assignment they have may play online games at the end of the
lesya [120]

Answer: 15

Step-by-step explanation:

x         60

___ = ____

24      100

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3 years ago
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Sliva [168]

Answer:

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Tn=4n-5

4 0
2 years ago
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