All categories

3 years ago

Graph the pair of lines and use their slopes to determine if they are parallel, perpendicular, or neither.

Mathematics

1 answer:

Temka [501]3 years ago

3 0

Well they have to be perpendicual because they cross and parallel means that they are like lines on lines paper, they do not cross, they just keep going. Hope this helps :)

You might be interested in

Raymond is four times as old as christine plus 5 years.Write an algebraic expression for Raymonds age in terms of christine age

igor_vitrenko [27]

Answer:

4c + 5 = R

Step-by-step explanation:

This should help you

8 0

3 years ago

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

Juanita is having a party at her house she is inviting 12 people.there will be 3 times as many boys as girls invited. let x repr

Margaret [11]

X + 3x = 12

(Or 4x=12)

the first x is the number of girls then the second x is the girls times 3, which is how many boys there are.

8 0

3 years ago

Find the function rule<br> X= -2,-1,0,1,2<br> Y= 9,4,-1,-6,-11

anygoal [31]

Answer:

The function rule for x is +1 and y is -5

Step-by-step explanation:

The function rule is basically the change for the set of numbers, like how x = 1, 2, 3, the function rule is +1, it's just the rate of change for the set of numbers.

6 0

3 years ago

Read 2 more answers

The table gives predictions of the average costs of a gasoline car after the year 2030. Which graph best represents the relation

kiruha [24]

Answer:

It's the b graph

Step-by-step explanation:

Khan Academy.

4 0

3 years ago

Read 2 more answers