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2 years ago

11

How do i solve this |6x-3|=7

1 answer:

Y_Kistochka [10]2 years ago

7 0

Answer:

x=5\3,-2\3

Step-by-step explanation:

You might be interested in

Which equation represents the distributive property?

Arte-miy333 [17]

Answer:

B

Step-by-step explanation:

Distributive property is when you use the number on the outside of the parenthesis to multiply to the inside. So, 36+9=3(12+3), in order to solve it on the parenthesis side you would take 3 and multiply it by 12, giving you 36. Then, you would take 3 and multiply it to the other 3 which gives you 9.

4 0

2 years ago

noted psychic was tested for extrasensory perception (ESP). The psychic was presented with 400 cards face down and asked to dete

adelina 88 [10]

Answer:

A sample of 11352 is needed.

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 given by:

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

For this problem, we have that:

400 cards, 120 cases were correct. So

$p = \frac{120}{400} = 0.3$

95% confidence level

So $\alpha = 0.05$ , z is the value of Z that has a pvalue of $1 - \frac{0.05}{2} = 0.975$ , so $Z = 1.96$ .

How large a sample n would you need to estimate p with margin of error 0.01 and 95% confidence

We would need a sample of size n, and n is found when $M = 0.01$ . So

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

$0.01 = 2.325\sqrt{\frac{0.3*0.7}{n}}$

$0.01\sqrt{n} = 2.325\sqrt{0.3*0.7}$

$\sqrt{n} = \frac{2.325\sqrt{0.3*0.7}}{0.01}$

$(\sqrt{n})^2 = (\frac{2.325\sqrt{0.3*0.7}}{0.01})^2$

$n = 11351.8$

Rounding up

A sample of 11352 is needed.

5 0

2 years ago

The perimeter of a rectangular painting is 264 centimeters. If the width of the painting is 55 centimeters, what is it’s len?

saul85 [17]

P = 2w + 2l
264 = 2(55) + 2l
264 = 110 + 2l
2l = 154
l = 77

the length is 77cm

4 0

2 years ago

The grocery store sells bacon for $5.30 per pound.

Ganezh [65]

Answer:

5.30x p

Step-by-step explanation:

Btw p stands for pounds

5 0

2 years ago

The ratio of boys to girls in Mr. Reddy's class is 3 to 4. Which of the following CANNOT

Svetradugi [14.3K]

Answer:

30

Step-by-step explanation:

3:4=9:12-total students 21

3:4=12:16-total students 28

3:4=15:20-total students 35

5 0

1 year ago