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BartSMP [9]
2 years ago
9

Need help anyone can help

Mathematics
1 answer:
Dima020 [189]2 years ago
5 0

Answer

D

step 1

Memorize the formula, or look at the formula and solve it.

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Answer:

By repeated subtraction.

Step-by-step explanation:

It is pretty much the same thing as division, but in subtraction. Since, Dividing and Subtraction are a like, repeated subtraction is a great example to use for this example

Hope this helps. :)

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1/2(6y-8)-(12y-16)+7
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-9y + 19

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3 years ago
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The mean weight of trucks traveling on a particular section of I-475 is not known. A state highway inspector needs an estimate o
kaheart [24]

Answer:

The 95 percent confidence interval for the population mean is between 14.736 tons and 16.864 tons.

Step-by-step explanation:

We have the population's standard deviation, so we can find the normal confidence interval.

We have that to find our \alpha level, that is the subtraction of 1 by the confidence interval divided by 2. So:

\alpha = \frac{1-0.95}{2} = 0.025

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 1-0.025 = 0.975, so z = 1.96

Now, find the margin of error M as such

M = z*\frac{\sigma}{\sqrt{n}}

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

M = 1.96*\frac{3.8}{\sqrt{49}} = 1.064

The lower end of the interval is the sample mean subtracted by M. So it is 15.8 - 1.064 = 14.736 tons

The upper end of the interval is the sample mean added to M. So it is 15.8 + 1.064 = 16.864 tons

The 95 percent confidence interval for the population mean is between 14.736 tons and 16.864 tons.

4 0
3 years ago
PLSSSS HELP ASSAP 50 POINTS FPR FIRST PERSON TO ANSWER ​
Dafna1 [17]

Answer:

a. 2/3 or 0.6666...

b. AB = 6cm and AD = 3cm

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28/42 = 2/3

14/21 = 2/3

42*1/7 = 6

21*1/7 = 3

6 0
4 years ago
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