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blagie [28]
2 years ago
7

PLSSS HELP IF YOU TURLY KNOW THISS

Mathematics
1 answer:
pogonyaev2 years ago
3 0

Answer:

your answer is 9

Step-by-step explanation:

3+3/4+5+1/4

3+5=8

3/4+1/4=4/4

4/4=1/1

1/1=1

8+1=9

9 miles

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Algebra 2 help please! I thought i got this one right but it’s wrong.
daser333 [38]

Answer:

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Step-by-step explanation:

5 0
2 years ago
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A student records the repair cost for 22 randomly selected dryers. A sample mean of $98.78 and standard deviation of $15.49 are
Gelneren [198K]

Answer:

The critical value that should be used is T = 2.0796.

The 95% confidence interval for the mean repair cost for the dryers is between $91.912 and $105.648.

Step-by-step explanation:

We have the standard deviation for the sample, which means that the t-distribution is used to solve this question.

The first step to solve this problem is finding how many degrees of freedom, we have. This is the sample size subtracted by 1. So

df = 22 - 1 = 21

95% confidence interval

Now, we have to find a value of T, which is found looking at the t table, with 21 degrees of freedom(y-axis) and a confidence level of 1 - \frac{1 - 0.95}{2} = 0.975. So we have T = 2.0796, which is the critical value that should be used.

The margin of error is:

M = T\frac{s}{\sqrt{n}} = 2.0796\frac{15.49}{\sqrt{22}} = 6.868

In which s is the standard deviation of the sample and n is the size of the sample.

The lower end of the interval is the sample mean subtracted by M. So it is 98.78 - 6.868 = $91.912

The upper end of the interval is the sample mean added to M. So it is 98.78 + 6.868 = $105.648

The 95% confidence interval for the mean repair cost for the dryers is between $91.912 and $105.648.

8 0
3 years ago
Pherris is graphing the function f(x) = 2(3)x. He begins with the point (1, 6). Which could be the next point on his graph?
Maurinko [17]

the next point would be (2,18)

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a student athlete runs 3 1/2 miles in 30 minutes. A professional runner can run 1 1/4 times as far in 30 minutes. How far can th
tresset_1 [31]
3 1/2 * 1 1/4 =
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3 years ago
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100 POINTS plz dont answer unless you know how to solve this.
Alexandra [31]

Answer:

31.9 mi

Step-by-step explanation:

AC/sin(angleABC) = AB/sin(angleACB)

6 0
2 years ago
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