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tatuchka [14]
2 years ago
8

Help plz this is a mastery test

Mathematics
2 answers:
oee [108]2 years ago
7 0

Answer:

8 1/30

Step-by-step explanation:

Calculate by converting into improper fractions.

Alexxx [7]2 years ago
6 0
8 1/30 should be the answer
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Simplify the expression.<br><br> 9(10+5) divide (6-5)<br><br> 17<br> 95<br> 85<br> 135
dalvyx [7]
135 because 10+5= 15. 15(9)=135. 6-5=1. so 135/1=135
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3 years ago
I don't know what to put here it just said to put at least 20 charters and all I need is help so I would appreciate it if you wo
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Solve the following system by ELIMINATION.<br><br> 6x + 10y= 16<br> 2x + 20y= -28
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The Environmental Protection Agency (EPA) publishes fuel economy values that are known to be good estimates of the fuel economy
r-ruslan [8.4K]

Answer:

The 90% confidence interval for the mean combined fuel economy for Ford Explorers is between 22.95 and 23.63 mpg.

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 = 16 - 1 = 15

90% confidence interval

Now, we have to find a value of T, which is found looking at the t table, with 15 degrees of freedom(y-axis) and a confidence level of 1 - \frac{1 - 0.9}{2} = 0.95. So we have T = 1.7531

The margin of error is:

M = T\frac{s}{\sqrt{n}} = 1.7531\frac{0.78}{\sqrt{16}} = 0.34

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 23.29 - 0.34 = 22.95 mpg

The upper end of the interval is the sample mean added to M. So it is 23.29 + 0.34 = 23.63 mpg

The 90% confidence interval for the mean combined fuel economy for Ford Explorers is between 22.95 and 23.63 mpg.

7 0
3 years ago
Bob Sparkle is mixing up a batch of Nuclear Fizz punch. He
jeyben [28]

Answer:

19 oz of cranberry juice

Step-by-step explanation:

32oz of water * (3 parts juice/5 parts water) = 19.2 oz of cranberry juice

Hope this helps!

Have a nice day <3

6 0
3 years ago
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