Slove for x -2(x+1/3)+9x=4<br><br><br> PLEASE HELP ASAP

14 is 28% of what number?

alexandr1967 [171]

1% of the number would be 14/28 which is 0.5. therefore 100% would be 0.5 x 100 which equals 50.

8 0

3 years ago

Ryan owns 3/8 of a florist shop worth 76,000. what is value of ryan's share of the business ?

Roman55 [17]

To find 3/8 of 76,000, multiply the two numbers.

3/8*76000/1= 228000/8

228000/8= 28500

Final answer: $28,500

7 0

3 years ago

Can someone answer me answer me this question

slamgirl [31]

Slope = (9 - 8)/(-17 - 15)
slope = 1 / -32
slope = -1/32

hope it helps

7 0

4 years ago

SOMEONE HELP ASAPPPP PLEASEEE,PLEASE EXPLAIN HOW U GOT YOUR ANSWER, I NEED AN EXPLANATION IN ORDER TO COMPLETE THIS! NO LINKS OR

alukav5142 [94]

Answer:

180 degree rotation

Step-by-step explanation:

according to the picture, we can see the wheel made half of a full rotation before it stopped. a full rotation of a circle is 360 degrees, so the car made a rotation of half of 360, which is 180 degrees.

let's check our work!

a full ride on a ferris wheel is two full rotations, which is 720 degrees. Maria rode for 1/4 of a turn which we solved for 180 degrees.

180 x 4 = 720 degrees.

our answer is correct

4 0

3 years ago

Airlines must be careful about the total weight of baggage carried by a plane on a commercial flight. Passengers with items exce

VikaD [51]

Answer:

The p-value of the test is 0.4966 > 0.05, which means that we cannot conclude, at the 0.05 level of significance, that there is a difference.

Step-by-step explanation:

Before solving this question, we need to understand the central limit theorem and subtraction of normal variables.

Central Limit Theorem

The Central Limit Theorem establishes that, for a normally distributed random variable X, with mean $\mu$ and standard deviation $\sigma$ , the sampling distribution of the sample means with size n can be approximated to a normal distribution with mean $\mu$ and standard deviation $s = \frac{\sigma}{\sqrt{n}}$ .

For a skewed variable, the Central Limit Theorem can also be applied, as long as n is at least 30.

For a proportion p in a sample of size n, the sampling distribution of the sample proportion will be approximately normal with mean $\mu = p$ and standard deviation $s = \sqrt{\frac{p(1-p)}{n}}$

Subtraction between normal variables:

When two normal variables are subtracted, the mean is the difference of the means, while the standard deviation is the square root of the sum of the variances.

To US and Canada:

37 overweight out of 256. So

$p_1 = \frac{37}{256} = 0.1445, s_1 = \sqrt{\frac{0.1445*0.8555}{256}} = 0.022$

Europe:

41 overweight out of 246. So

$p_2 = \frac{41}{246} = 0.1667, s_2 = \sqrt{\frac{0.1667*0.8333}{246}} = 0.0238$

Test if there is a difference between the proportion of all items on English Air flights to the U.S. and Canada which are overweight (p1) and the proportion of all items on English Air flights within Europe which are overweight (p2):

At the null hypothesis, we test if there is no difference, that is, if the subtraction of the proportions is 0.

$H_0: p_1 - p_2 = 0$

At the alternate hypothesis, we test if there is difference, that is, if the subtraction of the null hypothesis is different of 0.

$H_1: p_1 - p_2 \neq 0$

The test statistic is:

$z = \frac{X - \mu}{s}$

In which X is the sample mean, $\mu$ is the value tested at the null hypothesis and s is the standard error.

0 is tested at the null hypothesis:

This means that $\mu = 0$

From the two samples:

$X = p_1 - p_2 = 0.1445 - 0.1667 = -0.0222$

$s = \sqrt{s_1^2+s_2^2} = \sqrt{0.022^2 + 0.0238^2} = 0.0324$

Value of the test statistic:

$z = \frac{X - \mu}{s}$

$z = \frac{-0.0222 - 0}{0.0324}$

$z = -0.68$

P-value of the test:

The p-value of the test is the probability of the sample proportion differing from 0 by at least 0.0222, which is P(|z| > 0.68), which is 2 multiplied by the p-value of z = -0.68.

Looking at the z-table, z = -0.68 has a p-value of 0.2483

0.2483*2 = 0.4966

The p-value of the test is 0.4966 > 0.05, which means that we cannot conclude, at the 0.05 level of significance, that there is a difference.

3 0

3 years ago

Slove for x -2(x+1/3)+9x=4 PLEASE HELP ASAP