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Kitty [74]
3 years ago
9

Another name for segments qr

Mathematics
1 answer:
Helga [31]3 years ago
7 0

Answer: segment rq

<u>Explanation:</u>

Segments are named by their endpoints.  You can start/end with either endpoint.  So, qr can also be called rq.

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Anna35 [415]
B. I mean it’s super easy but I hope it helps
3 0
2 years ago
Solve negative 5 over 2, the whole multiplied by x minus 5 equals negative 55.
astraxan [27]

Answer:

-24

Step-by-step explanation:

-  \frac{5}{2} x \:  - 5 = 55

Multiply through by the denominator (that is, 2)

= 2 \times ( -  \frac{5}{2} x) \:  - 5(2) = 55(2)

=  - 5x - 10 = 110

Collect like terms

- 5x \:  = 110 +10

- 5x = 120

Divide through by - 5x

\frac{ - 5x}{ - 5}  =  \frac{120}{ - 5}

x =  - 24

5 0
3 years ago
Read 2 more answers
You want to obtain a sample to estimate a population mean. Based on previous evidence, you believe the population standard devia
Arturiano [62]

Answer:

n=(\frac{z_{\alpha/2} \sigma}{ME})^2   (3)

n=(\frac{2.58(54.5)}{5})^2 =790.846 \approx 791

So the answer for this case would be n=791 rounded up to the nearest integer

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".

\bar X represent the sample mean for the sample  

\mu population mean (variable of interest)

s represent the sample standard deviation

n represent the sample size  

Solution to the problem

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

\bar X \pm z_{\alpha/2}\frac{\sigma}{\sqrt{n}}   (1)

Since the Confidence is 0.99 or 99%, the value of \alpha=0.01 and \alpha/2 =0.005, and we can use excel, a calculator or a table to find the critical value. The excel command would be: "=-NORM.INV(0.005,0,1)".And we see that z_{\alpha/2}=2.58

The margin of error is given by this formula:

ME=z_{\alpha/2}\frac{\sigma}{\sqrt{n}}    (2)

And on this case we have that ME =+5 and we are interested in order to find the value of n, if we solve n from equation (2) we got:

n=(\frac{z_{\alpha/2} \sigma}{ME})^2   (3)

n=(\frac{2.58(54.5)}{5})^2 =790.846 \approx 791

So the answer for this case would be n=791 rounded up to the nearest integer

4 0
3 years ago
Question 2 of 10
rusak2 [61]

Answer:

4

Step-by-step explanation:

Since the base angles are the same, the side have to be the same

ML = MN

4x = x+3

Subtract x from each side

4x-x = x+3-x

3x= 3

Divide by 3

3x/3 = 3/3

x = 1

We want the length of MN

MN = x+3 = 1+3 = 4

4 0
2 years ago
Read 2 more answers
What is −3/8÷7/12 ?
RSB [31]

Answer:

-9/14

Step-by-step explanation:

This is my simplest-

Do the keep-change-flip method for this problem (and also any problem involving this)

KEEP -3/8

CHANGE the division sign to multiplication

FLIP the last fraction. 7/12 to 12/7

Now solve the problem by multiplying the fractions

-3/8 × 12/7 =

-3 × 12 = -36

8 × 7 = 56

-36 / 56 =

Simplify it by dividing the numerator (up of the line) and denominator (below the line) to get -9/14

5 0
2 years ago
Read 2 more answers
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