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Lena [83]
3 years ago
5

Help please im not sure

Mathematics
2 answers:
riadik2000 [5.3K]3 years ago
7 0

Answer:

<em>A linear pair is a pair of adjacent angles formed when two lines intersect.</em>

Step-by-step explanation:

option no. d because only these are the possible linear pairs

option no. d because only these are the possible linear pairs its according to me maybe wrong mark me brainliest

Lisa [10]3 years ago
4 0

Answer:

the first and last

Step-by-step explanation:

its correct

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A research group needs to determine a 90% confidence interval for the mean repair cost for all car insurance small claims. From
lutik1710 [3]

Answer:

a) z = 1.645

b) The should sample at least 293 small claims.

Step-by-step explanation:

We have that to find our \alpha level, that is the subtraction of 1 by the confidence interval divided by 2. So:

\alpha = \frac{1-0.9}{2} = 0.05

Now, we have to find z in the Ztable as such z has a pvalue of 1-\alpha.

So it is z with a pvalue of 1-0.05 = 0.95, so z = 1.645, which means that the answer of question a is z = 1.645.

Now, find  the margin of error M as such

M = z*\frac{\sigma}{\sqrt{n}}

In which \sigma is the standard deviation of the population and n is the size of the sample.

(b) If the group wants their estimate to have a maximum error of $12, how many small claims should they sample?

They should sample at least n small claims, in which n is found when

M = 12, \sigma = 124.88. So

M = z*\frac{\sigma}{\sqrt{n}}

12 = 1.645*\frac{124.88}{\sqrt{n}}

12\sqrt{n} = 205.43

\sqrt{n} = \frac{205.43}{12}

\sqrt{n} = 17.12

\sqrt{n}^{2} = (17.12)^{2}

n = 293

The should sample at least 293 small claims.

8 0
3 years ago
Write an expression in expanded form and an expression in factored form for the diagram.
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Step-by-step explanation:

You put them together to form a bigger number then break it down. sorry if it doesn't make sense.

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6 0
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Question 3 of 10
iragen [17]

Answer:

Question 3 of 10 The answer should be 7

Step-by-step explanation:

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3 years ago
Explain why the graph does or does not have represent a proportional relationship between the variables D&amp;T
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3 years ago
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A coin bank contains only quarters and dimes. The total value of the coins in the bank is $8.80. If the dimes were quarters and
masha68 [24]

Answer:

  • 18 dimes

Step-by-step explanation:

Let the number of dimes be d and quarters be q

<u>The value is $8.80 = 880¢, so:</u>

  • 10d + 25q = 880 ⇒ 2d + 5q = 176

<u>If the dimes were quarters and the quarters were dimes, the coins' total value would be $7.30 or 730¢</u>

  • 25d + 10q = 730 ⇒ 5d + 2q = 146

<u>Now we have 2 equations. Solving the system by elimination, subtract 5 times the second equation from twice the first equation:</u>

  • 2(2d + 5q) - 5(5d + 2q) = 2(176) - 5(146)
  • 4d - 25d = -378
  • -21d = -378
  • d = -378/-21
  • d = 18
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3 years ago
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