For what value of x is line a parallel to line b

SHOW HOW YOU GOT THE ANSWER FOR BRAINLIEST.

Shtirlitz [24]

The answer is -4x + 2

4 0

3 years ago

Two trains, Train A and Train B, weigh a total of 150 tons. Train A is heavier than train B. The difference of their weights is

Cloud [144]

Answer:

train b.

Step-by-step explanation:

becus of the 150 tons and 100 tons

6 0

3 years ago

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Choose the correct answer below. A. Increasing the level of confidence has no effect on the interval. B. Increasing the level of

murzikaleks [220]

Answer:

$ME = t_{\alpha/2} \frac{s}{\sqrt{n}}$

And the width for the confidence interval is given by:

$Width =2ME=2t_{\alpha/2} \frac{s}{\sqrt{n}}$

And we want to see the effect if we increase the confidence level for a interval. On this case if we increase the confidence level then the critical value for the confidence interval $t_{\alpha/2}$ would be higher and then the width of the interval would increase. So then the best answer for this case would be:

B. Increasing the level of confidence widens the interval.

Step-by-step explanation:

Let's assume that we have a parameter of interest $\mu$ who represent for example the true mean for a population. And we can construct a confidence interval in order to estimate this parameter if we know the distribution for the statistic let's say $\bar X$ and for this particular example the confidence interval is given by:

$\bar X \pm ME$

Where ME represent the margin of error for the estimation and this margin of error is given by:

$ME = t_{\alpha/2} \frac{s}{\sqrt{n}}$

And the width for the confidence interval is given by:

$Width =2ME=2t_{\alpha/2} \frac{s}{\sqrt{n}}$

And we want to see the effect if we increase the confidence level for a interval. On this case if we increase the confidence level then the critical value for the confidence interval $t_{\alpha/2}$ would be higher and then the width of the interval would increase. So then the best answer for this case would be:

B. Increasing the level of confidence widens the interval.

3 0

3 years ago

A dj is preparing a playlist of 21 songs. how many different ways can the dj arrange the first six songs on the playlist?

kirill115 [55]

Answer: The are 39,070,080 different ways the DJ can play the first 6 songs.

We will use the Fundamental Counting Principle to find the answer. Simply determine the number of choices for each position and multiply.

For the first choice there are 21 choices. Then, the number is reduced by 1 each time.

So to get the answer, we have to multiply the numbers below:

21 x 20 x 19 x 18 x 17 x 16

6 0

3 years ago

A student worked 46 hr during a week one summer the student earned $4.90 per hour for the first 40 hr and $7.35 per hour for ove

marysya [2.9K]

First you multiply how much they make per hour by the number of hours they worked that weren’t overtime. So you would multiply 4.9 and 40.
4.9(40)=$196
Then you multiply 7.35 and the number of hours worked overtime. To find the number of hours worked overtime you would subtract 40 from 46.
46-40=6
Now you multiply again.
7.35(6)=$44.10
Then you add the two amounts made together.
196+44.10=$240.10
The student makes $240.10.

3 0

3 years ago

Read 2 more answers