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3 years ago

angle, a and angle, b are complementary angles. angle a measures 22, degrees. What is the measure of angle b?

Mathematics

1 answer:

Natali [406]3 years ago

7 0

Answer:

158 degrees is angle b I think so

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Solve for X 4x-5=2x+3

Phantasy [73]

I’ve provided both the answer and explanation below! Hope this helps :)

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3 years ago

Read 2 more answers

Complete each statement with a number that makes the statement true.

Anuta_ua [19.1K]

Answer:

Step-by-step explanation:

1). (d). 5°C < 7°C

2). (a). - 8°C < - 3°C

3). (c). 4°C > - 4°C

4). (b). - 10°C > - 16°C

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2 years ago

Which is the better price- 17% off $35 or 12% off $32?Explain

butalik [34]

Despite having a lower percentage, the one with 12% off manages to have a better price in the long run do the starting price.

5 0

3 years ago

Which expression is equivalent to (3-5i)-(-2+i)

N76 [4]

Answer:

-6i + 5

Step-by-step explanation:

(3-5i)-(-2+i) = 3 - 5i + 2- i = (-5i - i) + (3 + 2) = -6i + 5

3 0

3 years ago

The situation is as follows: Smart phones have changed the world and how we spend our time. A group of researchers at BYU want t

Scilla [17]

Answer:

The 96% confidence interval estimate for the mean daily number of minutes that BYU students spend on their phones in fall 2019 is between 306.65 minutes and 317.35 minutes.

Step-by-step explanation:

Confidence interval normal

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

$\alpha = \frac{1 - 0.96}{2} = 0.02$

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

That is z with a pvalue of $1 - 0.02 = 0.98$ , so Z = 2.054.

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.

$M = 2.054\frac{54}{\sqrt{430}} = 5.35$

The lower end of the interval is the sample mean subtracted by M. So it is 312 - 5.35 = 306.65 minutes

The upper end of the interval is the sample mean added to M. So it is 312 + 5.35 = 317.35 minutes

The 96% confidence interval estimate for the mean daily number of minutes that BYU students spend on their phones in fall 2019 is between 306.65 minutes and 317.35 minutes.

8 0

2 years ago