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Schach [20]
3 years ago
11

ASAP please help me I need this quick The question and answers are in the picture

Mathematics
1 answer:
7nadin3 [17]3 years ago
5 0
Thé correct answer is the third one

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How do i solve ? <br><br> 6v-13v-18= -81
Anastaziya [24]

Primitevly do it like:

6v-13v-18=-81

- 7v= -63

v=9

P.S Strongly recommend to learn algebra's basics

8 0
3 years ago
You are interested in estimating the the mean weight of the local adult population of female white-tailed deer (doe). From past
alisha [4.7K]

Answer:

n=(\frac{2.33(19)}{7})^2 =39.996 \approx 40

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  

\mu population mean

\sigma=19 represent the assumed population standard deviation

n represent the sample size (variable of interest)  

Confidence =0.98 or 98%

Me=0.07 represent the margin of error for this case

Solution to the problem

The margin of error is given by this formula:

ME=z_{\alpha/2}\frac{\sigma}{\sqrt{n}}  (1)  

And on this case we have that ME =7 and we are interested in order to find the value of n, if we solve n from equation (1) we got:

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

The critical value for 98% of confidence interval now can be founded using the normal distribution. And in excel we can use this formla to find it:"=-NORM.INV(0.01,0,1)", and we got z_{\alpha/2}=2.33, replacing into formula (2) we got:

n=(\frac{2.33(19)}{7})^2 =39.996 \approx 40

So the answer for this case would be n=40 rounded up to the nearest integer

6 0
2 years ago
Bradley walks 0.65 mile each Friday to his friends house. He takes a different route home that is 1.2 miles. How many miles will
kari74 [83]

Answer:

96.2

Step-by-step explanation:

1. 0.65 +1.2 =1.85

2. 1.85*52=96.2

5 0
2 years ago
Four to the sixth power times four to the -8th power please explain how to do this I don't understand it
Alenkinab [10]
Your question equals 1/16 or 0.0625.
6 0
2 years ago
If X || Y and Y || Z, then _____<br><br> A) A || B<br> B) X || Z<br> C) X⊥A<br> D) A⊥Z
iris [78.8K]

Answer:

B) X || Z

Step-by-step explanation:

Hope it helps you in your learning process.

5 0
2 years ago
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