What does - 12/s - 5 - 9w use s =4 and w = 3 equal

Find the slope of the line containing points (1,3) (-3,-8)

IrinaK [193]

The answer is m=-11/-4

3 0

3 years ago

Read 2 more answers

On a protractor there are two scales read 1 scale to find 44 what is the measure on the scale

svlad2 [7]

136 would be the other measurement on a protractor.

3 0

3 years ago

Unit rate for 3 ounces for every 3/4 cup

Vanyuwa [196]

Answer:

4 ounces per cup

Step-by-step explanation:

To find the unit rate, we take the ounces and divide by cups. We want a 1 in the denominator

3 ounces÷3/4 cup

Copy dot flip

3 ounces * 4/3 per cup

4 ounces per cup

7 0

3 years ago

A researcher is concerned about the impact of students working while they are enrolled in classes, and she likes to know if stud

8_murik_8 [283]

Answer:

(a) Point estimate = 7.10

(b) The critical value is 1.960

(c) Margin of error = 0.800

(d) Confidence Interval = (6.3, 7.9)

(e) We are 90% confident that the average number of hours worked by the students is between 6.3 and 7.9

Step-by-step explanation:

Given

$\bar x = 7.10$ -- sample mean

$\sigma=5$ --- sample standard deviation

$n = 150$ --- samples

Solving (a): The point estimate

The sample mean can be used as the point estimate.

Hence, the point estimate is 7.10

Solving (b): The critical value

We have:

$CI = 90\%$ --- the confidence interval

Calculate the $\alpha$ level

$\alpha = 1 - CI$

$\alpha = 1 - 90\%$

$\alpha = 1 - 0.90$

$\alpha = 0.10$

Divide by 2

$\frac{\alpha}{2} = 0.10/2$

$\frac{\alpha}{2} = 0.05$

Subtract from 1

$1 - \frac{\alpha}{2} = 1 - 0.05$

$1 - \frac{\alpha}{2} = 0.95$

From the z table. the critical value for $1 - \frac{\alpha}{2} = 0.95$ is:

$z = 1.960$

Solving (c): Margin of error

This is calculated as:

$E = z * \frac{\sigma}{\sqrt n}$

$E = 1.960 * \frac{5}{\sqrt {150}}$

$E = 1.960 * \frac{5}{12.25}$

$E = \frac{1.960 *5}{12.25}$

$E = \frac{9.80}{12.25}$

$E = 0.800$

Solving (d): The confidence interval

This is calculated as:

$CI = (\bar x - E, \bar x + E)$

$CI = (7.10 - 0.800, 7.10 + 0.800)$

$CI = (6.3, 7.9)$

Solving (d): The conclusion

We are 90% confident that the average number of hours worked by the students is between 6.3 and 7.9

6 0

3 years ago

A small ferryboat transports vehicles from one island to another, and the order the vehicles arrive will lead to slightly differ

katen-ka-za [31]

Answer:

{PP, PR, RP, RR}

Step-by-step explanation:

Given that:

Passenger vehicle = P

Recreational vehicle = R

For each of the next two vehicles :

Sample space :

_____ P ______ R

P ___ PP _____ PR

R ___ RP _____ RR

{PP, PR, RP, RR}

B.) Tree diagram can be found in attached picture

5 0

3 years ago