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Lera25 [3.4K]
2 years ago
11

Please help! Will mark brainliest

Mathematics
2 answers:
Assoli18 [71]2 years ago
7 0

Answer:

3!!!

Step-by-step explanation:

|2(-6)+5| - 8((1)/(2))

hope this helped ahahaa <3

photoshop1234 [79]2 years ago
3 0
-6 x 2 +5 = -7
The absolute value of -7 is 7.
8 x 1/2 =4
7-4=3
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A simple random sample of 100 8th graders at a large suburban middle school indicated that 87% of them are involved with some ty
UkoKoshka [18]

Answer:

The confidence interval for the mean is given by the following formula:  

\hat p \pm z_{\alpha/2}\sqrt{\frac{\hat p (1-\hat p)}{n}}

And the margin of error is given by:

ME = 1.96 *\frac{0.87*(1-0.87)}{100} = 0.0659

Step-by-step explanation:

Previous concepts

A confidence interval is "a range of values that’s likely to include a population value with a certain degree of confidence. It is often expressed a % whereby a population means lies between an upper and lower interval".  

The margin of error is the range of values below and above the sample statistic in a confidence interval.  

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".  

Solution to the problem

In order to find the critical value we need to take in count that we are finding the interval for a proportion, so on this case we need to use the z distribution. Since our interval is at 95% of confidence, our significance level would be given by \alpha=1-0.95=0.05 and \alpha/2 =0.025. And the critical value would be given by:

z_{\alpha/2}=-1.96, z_{1-\alpha/2}=1.96

The confidence interval for the mean is given by the following formula:  

\hat p \pm z_{\alpha/2}\sqrt{\frac{\hat p (1-\hat p)}{n}}

And the margin of error is given by:

ME = 1.96 *\frac{0.87*(1-0.87)}{100} = 0.0659

5 0
3 years ago
Gypsies outside Castle Dracula ruined Jonathan’s plan to send secret mail by turning his letter over to the Count. True False
olga2289 [7]

Answer:

true

Step-by-step explanation:

3 0
3 years ago
Pls pls pls help me, im begging youuuk
DiKsa [7]

Answer:

angle f = 147 degree and angle e = 33degree

Step-by-step explanation:

here,

angle d= 147 degree

angle f = ?

angle e= ?

we know that,

angle d= angle f (Being alternate angle always be equal.)

or, 147 degree = angle f

Hence, angle f is 147 degree.

And,

angle d sum angle e= 180 degree(being cointerior angle)

or, 147 degree add angle e=180 degree

or, angle e= (180-147) degree

or, angle e= 33 degree

Hence, angle e is 33 degree.

so, angle f=147 degree

angle e= 33 degree

ANS

angle e= 33 degree

5 0
2 years ago
Read 2 more answers
Just a few more, help??????????
TiliK225 [7]

Answer:

53

Step-by-step explanation:

complementary angle meaning it needs to have the whole sum of 90 degree.

90-37=53

8 0
3 years ago
A rectangle is 9ft long and 40 in. Wide. What is the perimeter in inches ?
Troyanec [42]
B 360


Explanation: B 360
7 0
3 years ago
Read 2 more answers
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