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saveliy_v [14]
4 years ago
15

Please Help! 20 points!

Mathematics
1 answer:
Sergeeva-Olga [200]4 years ago
4 0

-2m - 5m - 8 = 3 + (-7) + m

-7m - 8 = -4 + m

or

-7m - 8 = m - 4

or

-8 - 7m = -4 + m

Answer

2) -7m - 8 = m - 4

4) m - 4 = -7m - 8

5) -8 - 7m = -4 + m

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Answer: 62.

Step-by-step explanation: The mean is the average. In order to find the average, we need to add all of the numbers up, then divide by the number of quizzes. So:

20 + 40 + 40 +40 + 60 + 60 + 60 + 60 + 80 + 80 + 80 + 80 + 100 = 800

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3 years ago
How is the decimal 1.7 expressed as a percent?
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Answer: 170%

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3 years ago
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Which ordered pair (a, b) is the solution to the following system of equations?
Kamila [148]

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  (-13, -4)

Step-by-step explanation:

It is about as easy to try the solutions as it is to find them from scratch.

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However, we can determine which one it is by adding twice the second equation to the first.

  (-2a +3b) +2(a -4b) = (14) +2(3)

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8 0
3 years ago
As a preliminary measure, you want to review only the top 25% of applicants on the basis of of standardized test scores. How doe
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Calculating the z-score provides additional information regarding how each subject did overall as the z-score takes dispersion into account.

<h3>What is a z score?</h3>

Z-score indicates how much a given value differs from the standard deviation.  For example, the mean of a test could be a 73 and if a student scored an 85, that's great.

However, if the data is not spread out, that 85 could be the highest in the class by 10 points. That's much more information than just 15 points above the mean. This way you can tell when someone not only did well but did exceptionally well in comparison to his or her peers.

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7 0
2 years ago
There are 24 pens in a desk drawer. The pens are either red or blue. The ratio of red pens to blue pens is 5:1. How many pens ar
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Answer:

The number of red pens is 20.

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Step-by-step explanation:

We are given that, the ratio of number of red pens to the number of blue pens is 5 : 1.

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Total number of pens in the desk drawer = 24

Now, according to question :

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Number of blue pens in the drawer = <em>x</em> = 4

6 0
3 years ago
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