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Aleks04 [339]
3 years ago
8

Factorise this expression: 7y + 14

Mathematics
1 answer:
Harlamova29_29 [7]3 years ago
5 0

the ans is 7(y +2) because 7 is a factor of 14 and its seven y so u bring out 7 and leave y and 2
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The original quantity is 20 and the new quantity is 15. Adam incorrectly says the percent decrease is about ​14.29%. What is the
Yuki888 [10]

Answer: A. divided the difference of the two quantities by the sum of the two quantities.

===================================================

Explanation:

The difference of the quantities is 20-15 = 5

The sum of the quantities is 20+15 = 35

Dividing those results leads to 5/35 = 0.142857 which rounds to 0.1429

That converts to 14.29%

This is likely the path Adam took. This path is incorrect. The correct steps are shown below

---------------------

Difference = 20-15 = 5

Divide the difference over the original quantity

5/20 = 1/4 = 0.25 = 25%

We have a 25% decrease because the new quantity (15) is smaller than the old quantity (20)

----------------------

Here's another way to approach the problem

A = old value = 20

B = new value = 15

C = percent change

C = [ (B-A)/A ] * 100%

C = [ (15-20)/20 ] * 100%

C = (-5/20)*100%

C = -0.25*100%

C = -25%

The negative C value means we have a negative percent change, ie we have a percent decrease. So this is another way to get a 25% decrease.

4 0
2 years ago
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Travka [436]

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Factor for y is y

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Factors for Z^2 is z*z

The GCF would be x^4z^2

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54.8, 49.1 and 51.3 are not unusual; 56.5 is unusual, because it's greaster than 56.

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Answer:

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Step-by-step explanation:

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Answer:

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