Ask question

Ask question

All categories

3 years ago

7

a line that contains point (2, –2) and perpendicular to another line whose slope is –1. What is the equation of the line and gra

ph?

1 answer:

dolphi86 [110]3 years ago

5 0

It would x - 4 = y because tge opposite reciprocal of -1 is 1 and so using point slope form y + 2 = x - 2 and when simplified youll get x - 4 = y.

You might be interested in

The value of 30, to one decimal place, is approximately what?

andrew-mc [135]

the answer is 5.5

when we write root of 30 in the calculater we get 5.477225575...

so we can round this off to one decimal point

and when we do the final answer will be 5.5

<em>hope</em><em> </em><em>that</em><em> </em><em>helps</em><em> </em><em>!</em>

8 0

3 years ago

Write the following number in standard decimal form.<br> one and eighty-five hundredths

sergejj [24]

Answer:

1.85

Step-by-step explanation:

0ne (1) and Eighty - five hundredths (0.85)

Hope this helps

Mark Brainliest!

7 0

3 years ago

Read 2 more answers

A scuba diver used the expression below to describe his position in relation to sea level.

alex41 [277]

It is the first statement. It is positive two, so it’s above sea level. We can immediately get rid of the last two statements. Then, it is negative 20. The is 18 feet below sea level, because 2-20 is -18. Positive 8 shows rising up by 8 feet. The correct statement is the first one.

3 0

3 years ago

Read 2 more answers

The dwarves of the Grey Mountains wish to conduct a survey of their pick-axes in order to construct a 99% confidence interval ab

Dmitry_Shevchenko [17]

Answer:

The minimum sample size needed is 125.

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of $\pi$ , and a confidence level of $1-\alpha$ , we have the following confidence interval of proportions.

$\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}$

In which

z is the zscore that has a pvalue of $1 - \frac{\alpha}{2}$ .

The margin of error is:

$M = z\sqrt{\frac{\pi(1-\pi)}{n}}$

For this problem, we have that:

$\pi = 0.25$

99% confidence level

So $\alpha = 0.01$ , z is the value of Z that has a pvalue of $1 - \frac{0.01}{2} = 0.995$ , so $Z = 2.575$ .

What minimum sample size would be necessary in order ensure a margin of error of 10 percentage points (or less) if they use the prior estimate that 25 percent of the pick-axes are in need of repair?

This minimum sample size is n.

n is found when $M = 0.1$

So

$M = z\sqrt{\frac{\pi(1-\pi)}{n}}$

$0.1 = 2.575\sqrt{\frac{0.25*0.75}{n}}$

$0.1\sqrt{n} = 2.575{0.25*0.75}$

$\sqrt{n} = \frac{2.575{0.25*0.75}}{0.1}$

$(\sqrt{n})^{2} = (\frac{2.575{0.25*0.75}}{0.1})^{2}$

$n = 124.32$

Rounding up

The minimum sample size needed is 125.

5 0

4 years ago

HELPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPP

Vilka [71]

Question 29 is A 2 and 30 is C 3

5 0

3 years ago

Read 2 more answers