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Sauron [17]
3 years ago
10

The diagram shows two rectangles which have the same area . Find the value of y.​

Mathematics
1 answer:
jeka57 [31]3 years ago
7 0

Answer:

y = 4

Step-by-step explanation:

Since the 2 rectangles have the same area, then

12.5 × 2y = 5 × 20

25y = 100 ( divide both sides by 25 )

y = 4

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Answer:

Option D - Will not be rejected at the 0.05 level.

Step-by-step explanation:

The significance level, which is denoted as "α", is a measure of the strength of the evidence that must be present in a sample before we can reject the null hypothesis and conclude that the effect is statistically significant. Now, this significance level must be determined before conducting an experiment.

Now, in the context of this question, the significance level is the probability of rejecting the null hypothesis when it is true. For example, a significance level of 0.05 means a 5% risk of concluding that a difference exists when there is no actual difference. Now, lower significance levels will indicate that we require stronger evidence before we can reject the null hypothesis.

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chubhunter [2.5K]

Answer:

(6,-4)

Step-by-step explanation:

-3x-9y = 18 (equation 1)

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multiply equation 2 by 3, and add it to equation 2

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

X's cancel out

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Divide both sides by 9

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Plug in 6 for x in any of the original equations

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Therefore the solution is (6,-4).

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