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Margarita [4]
3 years ago
8

Evaluate: -22+(-45) = [?]

Mathematics
2 answers:
patriot [66]3 years ago
7 0

Answer:

-67

Step-by-step explanation:

fenix001 [56]3 years ago
5 0

hope this helps you

have a great day

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Joe heard from a reliable source that only 22% of people actually sleep 8 hours or more per night. You do a survey and find 58 o
Juliette [100K]

Answer:

95% Confidence interval:  (31.32%,47.04%)

Step-by-step explanation:

We are given the following in the question:

Sample size, n = 148

Number of people who sleep for 8 hours or longer, x = 58

\hat{p} = \dfrac{x}{n} = \dfrac{58}{148} = 0.3918

95% Confidence interval:

\hat{p}\pm z_{stat}\sqrt{\dfrac{\hat{p}(1-\hat{p})}{n}}

z_{critical}\text{ at}~\alpha_{0.05} = 1.96

Putting the values, we get:

0.3918\pm 1.96(\sqrt{\dfrac{0.3918(1-0.3918)}{148}})\\\\ = 0.3918\pm 0.0786\\\\=(0.3132,0.4704)=(31.32\%,47.04\%)

(31.32%,47.04%)  is the required 95% confidence interval.

8 0
3 years ago
What is the area of the composite figure above?
slega [8]

Answer:

18550cm²

Step-by-step explanation:

140×110=15400

½×70×90=3150

15400+3150=18550

5 0
2 years ago
Read 2 more answers
If x=y then what does y=x equals? I will give you brainliest if you help me.
MissTica
Yes because they're the same
4 0
2 years ago
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Which table represents a quadratic function?
polet [3.4K]

Answer:

Its A i just took the test

Step-by-step explanation:

7 0
2 years ago
Um can some one pls explain this​
slamgirl [31]

Answer:

the answer is c) 182.25

Step-by-step explanation:

The information provided gives you a scale that will ultimately allow you to determine the height of the larger cylinder.

Since it tells us the two are similar, we can use the scale to solve for the second height.

Set up your math like this:

\frac{16}{h}=\frac{64}{729}

h represents the height you are trying to find.

using a common multiple, you can solve for h.

16 times 4 is 64. so 729 divided by 4 is 182.25

5 0
3 years ago
Read 2 more answers
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