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4 years ago

Linear graphing y= -2x

Mathematics

1 answer:

Vlad1618 [11]4 years ago

3 0

Let x = 0. What do you get for y?
This gives you one point.

Then let x = 1. What do you get for y.
This gives you a second point.

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Randomly selected students participated in an experiment to test their ability to determine when one minute (or sixty seconds)

zalisa [80]

Answer: $(57.41,\ 62.19)$

Step-by-step explanation:

Given : Sample size : $n=40$

Sample mean : $\overline{x}=59.8\text{ seconds}$

Standard deviation : $\sigma =9.2\text{ seconds}$

Significance level : $\alpha=1-0.9=0.1$

Critical value : $z_{\alpha/2}=1.645$

Formula to find the confidence interval for population mean :-

$\overline{x}\pm z_{\alpha/2}\dfrac{\sigma}{\sqrt{n}}\\\\=59.8\pm(1.645)\dfrac{9.2}{\sqrt{40}}\\\\\approx59.8\pm2.39\\\\=(59.8-2.39,\ 59.8+2.39)\\\\=(57.41,\ 62.19)$

Hence, a 90% confidence interval estimate of the population mean of all students = $(57.41,\ 62.19)$

6 0

3 years ago

Please show all your work along with the answer!

enyata [817]

Answer:I think its 0.7

Step-by-step explanation:

hope that helps but I am not to sure :((

2/7x + 1/10 = 1 - x

is 0.7

6 0

3 years ago

HELP!! I need a 2x2 matrix for A to make the equation true.. I'm really confused so please help me. If you could give a little e

NikAS [45]

0 1
1 0

this might be better

5 0

3 years ago

Find the square root of 3correct to 2 places of decimals

natita [175]

It is 1.73
Hope I helped

3 0

3 years ago

Consider the function below. Find f(x) = 7<br><br> f(x) = 4x - 9

Novosadov [1.4K]

Answer:

x=4

Step-by-step explanation:

it tel you that f(x) = 7 so replace "f(x)" for 7 in the equation. You then get 7 = 4x - 9 so now you solve for x. You have to isolate x so you add 9 to the other side since you do the opposite of -9. Once you add 9 and 7, then divide the answer by 4. You should get 4 = x.

Work:

f(x) = 4x - 9

7 = 4x - 9

7 + 9 = 4x

16 = 4x

16 ÷ 4 = x

4 = x

7 0

3 years ago