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3 years ago

BRAINLEST+THANKS!! Thank uu

Mathematics

2 answers:

saul85 [17]3 years ago

8 0

Answer:

I'm gonna try. x = 7.71428571429???? I honestly have no idea since im not at this stuff yet.

Step-by-step explanation:

azamat3 years ago

6 0

Answer:

hiiii

the question isn't seen clearly

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Find the value of x A. 44 B. 34 C. 56 D. 22 SHOW ALL WORK

mrs_skeptik [129]

Answer:

34°

Step-by-step explanation:

To figure out the angle of the said letter, we divide the outer angle by 2 to get the answer. Since the outer angle is 68°, half of that is 34°. I hope this helps. Please mark me the brainliest because I really need it. Thanks!

8 0

4 years ago

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In an art class 40% of the students use watercolors for pain 10 students in the art class use watercolors how many students were

yarga [219]

10=0.4%*n

100 = 4n

n=100/4

n= 25 students

3 0

3 years ago

Suppose we are interested in analyzing the weights of NFL players. We know that on average, NFL players weigh 247 pounds with a

Diano4ka-milaya [45]

Answer:

a) The standard error would be of 8.58 pounds.

b) The margin of error is 14.11 pounds.

c) The 90% confidence interval for the population mean is between 232.89 pounds and 261.11 pounds

Step-by-step explanation:

a.What is the standard error?

The standard error is

$s = \frac{\sigma}{\sqrt{n}}$

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

$s = \frac{47}{\sqrt{30}} = 8.58$

The standard error would be of 8.58 pounds.

b.What is the margin of error at 90% confidence?

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 $z = 1.645$

Now, find the margin of error M as such

$M = z*s = 1.645*8.58 = 14.11$

The margin of error is 14.11 pounds.

c. Using my sample of 30, what would be the 90% confidence interval for the population mean?

Lower bound: Sample mean subtracted by the margin of error.

247 - 14.11 = 232.89 pounds

Upper bound

247 + 14.11 = 261.11 pounds

The 90% confidence interval for the population mean is between 232.89 pounds and 261.11 pounds

4 0

3 years ago

How many solutions to y=2x-3 y=-x+3

Ivan

Answer:

y = 1

Step-by-step explanation:

I dunno what you need but that's the answer to y...

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3 years ago

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Evaluate the expression when C=1/2 and D=1/12 3(1/4+C²)+2D Please hurry!

Mkey [24]

Answer is 1 1/12
3(1/4 + 1/2^2)+ (2x1/12)
3/4+1/4+2/12 (you get to this part by distributing 3 throughout the parentheses)
9/12+3/12+2/12= 1 1/12 hope this helps

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3 years ago

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