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3 years ago

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Jordan types in a constant rate of 40 words per minute the number of words typed, y, is a function of the number of minutes spen

t typing, x.

1 answer:

Artist 52 [7]3 years ago

3 0

Answer:

40y=x

Step-by-step explanation:

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BRAINLIEST ASAP! PLEASE HELP ME :)

Andrews [41]

Step-by-step explanation:

Using cos ^2x+sin^2 x = 1

RHS = cos ^2x+sin^2 x = 1

Therefore,

LHS = cos ^2 x − cos ^4 x

= cos ^2 x ( 1 − cos ^2 x )

= cos ^2 x sin ^2 x

= ( 1 − sin ^2 x ) sin ^2 x

= sin ^2 x − sin ^4 x

= RHS

3 0

3 years ago

Read 2 more answers

A line has a slope of and a y-intercept of –2.<br><br> What is the x-intercept of the line?

irakobra [83]

Answer:The equation of the line that has a slope of -1/2 and a y-intercept of -2 is: y=-1/2x-2. All you really have to do here is replace m with -1/2, which is the slope you gave, and replace b with -2, the y-intercept you gave, in the equation y=mx+b.

If this helped, please mark me brainliest, thank you and if you need more help, feel free to message me .

Step-by-step explanation:

8 0

3 years ago

A survey of 35 individuals who passed the seven exams and obtained the rank of Fellow in the actuarial field finds the average s

arsen [322]

Answer:

$150000-2.032\frac{15000}{\sqrt{35}}=144847.94$

$150000+2.032\frac{15000}{\sqrt{35}}=155152.06$

So on this case the 95% confidence interval would be given by (144847.94;155152.06)

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".

$\bar X=150000$ represent the sample mean

$\mu$ population mean (variable of interest)

s=15000 represent the sample standard deviation

n=35 represent the sample size

Solution to the problem

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

$\bar X \pm t_{\alpha/2}\frac{s}{\sqrt{n}}$ (1)

In order to calculate the critical value $t_{\alpha/2}$ we need to find first the degrees of freedom, given by:

$df=n-1=35-1=34$

Since the Confidence is 0.95 or 95%, the value of $\alpha=0.05$ and $\alpha/2 =0.025$ , and we can use excel, a calculator or a table to find the critical value. The excel command would be: "=-T.INV(0.025,34)".And we see that $t_{\alpha/2}=2.032$

Now we have everything in order to replace into formula (1):

$150000-2.032\frac{15000}{\sqrt{35}}=144847.94$

$150000+2.032\frac{15000}{\sqrt{35}}=155152.06$

So on this case the 95% confidence interval would be given by (144847.94;155152.06)

3 0

4 years ago

Plsss help if u know the answer (application of systems)

AVprozaik [17]

Answer:

Step-by-step explanation:

C

8 0

3 years ago

X+3Y=6 turned into slope-intercept form

GarryVolchara [31]

Y=-1/3x+2

Use photomath app

3 0

3 years ago