3 years ago

Trigonometry help please

Mathematics

2 answers:

Nesterboy [21]3 years ago

5 0

Answer:

Thanks for points!

Step-by-step explanation:

hjlf3 years ago

4 0

Hellooooooooooooooo:)

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HURRY Which is an equation in point-slope form for the line that passes through the points (−1,4) and (3,−4) ?

mash [69]

Answer:

y-4=-2(x+1)

Step-by-step explanation:

y-y1=m(x-x1)

m=(y2-y1)/(x2-x1)

m=(-4-4)/(3-(-1))

m=-8/(3+1)

m=-8/4

m=-2

y-4=-2(x-(-1))

y-4=-2(x+1)

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3 years ago

The area of a rectangle is 70 square inches.

podryga [215]

The correct answer is option a

but i think there s a mistake .
is the value w represent length

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3 years ago

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Assoli18 [71]

B)-3 for the vertex, do u have to graph it?

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3 years ago

Find the quadractic function to model the values in the table.

Shtirlitz [24]

Answer: y=3x^2+3x-3

(the first option)

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3 years ago

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You want to obtain a sample to estimate a population mean. Based on previous evidence, you believe the population standard devia

gtnhenbr [62]

Answer:

$n=(\frac{2.58(58.2)}{1})^2 =22546.82 \approx 22547$

So the answer for this case would be n=22547 rounded up to the nearest integer

Step-by-step explanation:

Let's define some notation

$\bar X$ represent the sample mean

$\mu$ population mean (variable of interest)

$\sigma=58.2$ represent the population standard deviation

n represent the sample size

$ME =1$ represent the margin of error desire

The margin of error is given by this formula:

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

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

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

The critical value for 99% of confidence interval now can be founded using the normal distribution. The significance would be $\alpha=0.01$ and the critical value $z_{\alpha/2}=2.58$ , replacing into formula (b) we got:

$n=(\frac{2.58(58.2)}{1})^2 =22546.82 \approx 22547$

So the answer for this case would be n=22547 rounded up to the nearest integer

3 0

3 years ago