All categories

3 years ago

Can some one help thanks

Mathematics

2 answers:

Aleks04 [339]3 years ago

6 0

The answer would be A if I did my math correctly

kozerog [31]3 years ago

4 0

Answer:

y = 8

Step-by-step explanation:

First substitute x with 6 in the equation

2y + 1/3(6) = 18

Multiple 1/3 with 6, which is 2

2y + 2 = 18

Solve the equation by subtracting 2 from both sides

2y + 2 = 18

- 2 - 2

You get 2y = 16, so you divide 2 frm both sides

You get y = 8

You might be interested in

Given that 6 > -2, which statements are true? Check all that apply.

Dmitry_Shevchenko [17]

Answer:

hello rspl social science sample paper chaye

8 0

3 years ago

Read 2 more answers

10 + (-2X + 8) + 2y when x = -5 and y = -9

Katarina [22]

Answer:

Step-by-step explanation:

10 + (-2 • -5 + 8) + 2 • -9

10 + 10 + 8 + -18

20 + 8 + -18

28 - 18

6 0

3 years ago

HELP ASAP PLS i’ll really appreciate it!!

Airida [17]

Sorry this is sloppy

3 0

4 years ago

A reproductive clinic had a success rate of 25% of patients with live births in 2008. They want to update their success rate (th

Anastasy [175]

Answer:

They should sample the results of 1990 patient results.

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 z-score that has a p-value of $1 - \frac{\alpha}{2}$ .

The margin of error is of:

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

A reproductive clinic had a success rate of 25% of patients with live births in 2008.

This means that $\pi = 0.25$

99% confidence level

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

If they want their estimate to be within 2.5%, how many patient's results should they sample if they plan to use a 99% confidence interval?

They should sample n patients.

n is found for $M = 0.025$ . So

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

$0.025 = 2.575\sqrt{\frac{0.25*0.75}{n}}$

$0.025\sqrt{n} = 2.575\sqrt{0.25*0.75}$

$\sqrt{n} = \frac{2.575\sqrt{0.25*0.75}}{0.025}$

$(\sqrt{n})^2 = (\frac{2.575\sqrt{0.25*0.75}}{0.025})^2$

$n = 1989.2$

Rounding up:

They should sample the results of 1990 patient results.

3 0

3 years ago

How to write 15409 in expanded form

Lady_Fox [76]

10,000 + 5,000 + 400 + 9

7 0

4 years ago

Read 2 more answers