All categories

3 years ago

HELPPP ASAP!!! GIVING BRAINLIEST!!!!

Mathematics

1 answer:

diamong [38]3 years ago

5 0

Answer:

x = -4 and x = -2

Step-by-step explanation:

You might be interested in

A pack of five basic solid T-shirts costs $29.95 in a store. The sales tax where they are sold is 7.75%. What is the unit cost o

Anna71 [15]

Answer:

6.45

Step-by-step explanation:

29.95+7.75%=32.27

32.27/5

6.45

3 0

3 years ago

Read 2 more answers

Jessica walks 13 mile to the post office and then 25 mile to the library.

Leto [7]

Answer:

B. 38 Miles. add 13 and 25 what do you get? 38.

Step-by-step explanation:

6 0

2 years ago

Read 2 more answers

In one month, Claudia rides her favorite bike trail 12 times. She travels a total distance of 1182 km. What is the length of Cla

kati45 [8]

The length of the trail is 98.5 KM, all you need to do is divide the total distance by the number of times she went on it.

4 0

3 years ago

Read 2 more answers

Math problem giving brainlist and 15 points

zaharov [31]

Answer:

pic is block

Step-by-step explanation:

4 0

3 years ago

A computer manufacturing company has sent a mail survey to 2,800 of its randomly selected customers that have purchased a new la

vodka [1.7K]

Answer:

The 96% confidence interval for the population proportion of customers satisfied with their new computer is (0.77, 0.83).

Step-by-step explanation:

We have to calculate a 96% confidence interval for the proportion.

We consider the sample size to be the customers that responded the survey (n=800), as we can not assume the answer for the ones that did not answer.

The sample proportion is p=0.8.

$p=X/n=640/800=0.8$

The standard error of the proportion is:

$\sigma_p=\sqrt{\dfrac{p(1-p)}{n}}=\sqrt{\dfrac{0.8*0.2}{800}}\\\\\\ \sigma_p=\sqrt{0.0002}=0.014$

The critical z-value for a 96% confidence interval is z=2.054.

The margin of error (MOE) can be calculated as:

$MOE=z\cdot \sigma_p=2.054 \cdot 0.014=0.03$

Then, the lower and upper bounds of the confidence interval are:

$LL=p-z \cdot \sigma_p = 0.8-0.03=0.77\\\\UL=p+z \cdot \sigma_p = 0.8+0.03=0.83$

The 96% confidence interval for the population proportion is (0.77, 0.83).

4 0

3 years ago