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harkovskaia [24]
3 years ago
7

Simplify each expression. 2(10m-7a) + (8a-3m)

Mathematics
2 answers:
Morgarella [4.7K]3 years ago
7 0
17m-6a is the answer
valentina_108 [34]3 years ago
5 0
-6a + 17m

Hope this helps :)
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The director of the library believes that 14% of the library's collection is checked out. If the director is right, what is the
Ksivusya [100]

Answer: 0.2643

Step-by-step explanation:

Let p be the population proportion and \hat{p} be the sample proportion .

As per given question , we have

p=0.14\\\\ \hat{p}=0.13\\\\ n=478

z-score : \dfrac{\hat{p}-p}{\sqrt{\dfrac{p(1-p)}{n}}}

z=\dfrac{0.13-0.14}{\sqrt{\dfrac{0.14(1-0.14)}{478}}}\\\\=-0.630087269176\approx-0.63

The required probability ( using z-table ):-

P(z

Hence, the probability that the proportion of books checked out in a sample of 478 books would be less than 13% = 0.2643

5 0
3 years ago
Are they congruent? How do you know?
pogonyaev

Answer:

Yes, if you translate either plane, they will end up in the exact location.

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3 years ago
What is the value of x?<br> Enter your answer in the box.
Liono4ka [1.6K]

Answer:

x = 80 degree

Step-by-step explanation:

As sum of all angles in a triangle is equal to 180

so:

According to the given figure:

70  + 30 + x = 180

By simplifying

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i hope it will help you!

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3 years ago
Evaluate the expression 2(8 - 4)^2 - 10 / 2
Artemon [7]
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-21





you can change the -10/2 to a -5 and it will be easier.
5 0
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Read 2 more answers
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The answer to your question is A.
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