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2 years ago

SOMEONE PLS HELP ME PLEASE I BEG U AND SHOW WHY PLS I BEG

Mathematics

2 answers:

Illusion [34]2 years ago

8 0

Answer:

The answer is less than one

Step-by-step explanation:

Because 1/2= less than 3

1 1/2= 3 and is less than 9

2 1/2= 5 not 15

MissTica2 years ago

7 0

Answer:

less than 1 (d)

Step-by-step explanation:

1/2= less than 3

1 1/2= 3 and is less than 9

2 1/2= 5 other than 15

Brainliest???

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8) BRAINLIEST + 15+ POINTS! :)<br><br> Which of the following is a graph of y=1/2 x +1

LuckyWell [14K]

Answer:

Step-by-step explanation:

We can rule out the second and third because the y intercept in those graphs are not 1

Now lets look at the point 2,5 on graph a

y=1/2x+1

so 5=1+1 but that is false

D is the answer by elimination

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3 years ago

Factorise <br>a^2-4ab+5b^2-c^2+6bc

Gennadij [26K]

There is no way this is a middle school question

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3 years ago

57% of what number is 22.2 million?

Mademuasel [1]

I got 12.654 I'm not sure it is right though.

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3 years ago

Give the slope and the y-intercept of the line y = – 6x– 4. Make sure the y-intercept is written as

jonny [76]

Answer:

Step-by-step explanation:

Slope = -6

Y-intercept (0, -4)

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3 years ago

Using the simple random sample of weights of women from a data set, we obtain these sample statistics: nequals45 and x overbar

Tomtit [17]

Answer: (141.1, 156.48)

Step-by-step explanation:

Given sample statistics : $n=45$

$\overline{x}=148.79\text{ lb}$

$\sigma=31.37\text{ lb}$

a) We know that the best point estimate of the population mean is the sample mean.

Therefore, the best point estimate of the mean weight of all women = $\mu=148.79\text{ lb}$

b) The confidence interval for the population mean is given by :-

$\mu\ \pm E$ , where E is the margin of error.

Formula for Margin of error :-

$z_{\alpha/2}\times\dfrac{\sigma}{\sqrt{n}}$

Given : Significance level : $\alpha=1-0.90=0.1$

Critical value : $z_{\alpha/2}=z_{0.05}=\pm1.645$

Margin of error : $E=1.645\times\dfrac{31.37}{\sqrt{45}}\approx 7.69$

Now, the 90% confidence interval for the population mean will be :-

$148.79\ \pm\ 7.69 =(148.79-7.69\ ,\ 148.79+7.69)=(141.1,\ 156.48)$

Hence, the 90% confidence interval estimate of the mean weight of all women= (141.1, 156.48)

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3 years ago