Solve the problem 5x+(x+6)+3x

Wat is the length of side s of the square shown below

Greeley [361]

WE NEED THE PICTURE! AND I THINK YOU MEAN *WHAT!

5 0

3 years ago

Read 2 more answers

Three more than three times a number is 72. Find the number

puteri [66]

Answer:

23

Step-by-step explanation:

3x+3=72

3x=72-3

3x=69

x=23

7 0

4 years ago

What is the perimeter of 2m 10cm by 45 cm

qwelly [4]

I believe it is 510 cm because a meter equals 100 cm so 210 cm times 2 equals 410 cm then multiply 45 times 2 and get 90 cm then add 410 plus 90 and get 510 cm.

6 0

3 years ago

Which is the better buy on hamburger meat?

Charra [1.4K]

Answer:

2 lbs. for $4.50

Step-by-step explanation:

Do a ratio

2 : 4.50

You want to see how much it cost per pound, so divide them by 2

2 ÷ 2 : 4.50 ÷ 2

1 : 2.25

So per pound, the hamburger will cost $ 2.25

________________________________________________________

3 : 6.90

You want to see how much it cost per pound, so all you need to do is divide them by 3

3 ÷ 3 : 6.90 ÷ 3

1 : 2.3

So for the first one, it cost 2.25 per pound, and for the second one, it cost 2.3 per pound....the one that is better will be 2.25 because it cost 5 cents less than the second one

Hope this helped!

Have a supercalifragilisticexpialidocious day!

7 0

3 years ago

A powerful women's group has claimed that men and women differ in attitudes about sexual discrimination. A group of 50 men (grou

Marta_Voda [28]

Answer:

$z=\frac{0.22-0.475}{\sqrt{0.333(1-0.333)(\frac{1}{50}+\frac{1}{40})}}=-2.549$

Step-by-step explanation:

Data given and notation

$X_{1}=11$ represent the number of men who believe that sexual discrimination is a problem

$X_{2}=19$ represent the number of women who believe that sexual discrimination is a problem

$n_{1}=50$ sample 1 selected

$n_{2}=40$ sample 2 selected

$p_{1}=\frac{11}{50}=0.22$ represent the proportion estimated of men who believe that sexual discrimination is a problem

$p_{2}=\frac{19}{40}=0.475$ represent the proportion estimated of female who believe that sexual discrimination is a problem

$\hat p$ represent the pooled estimate of p

z would represent the statistic (variable of interest)

$p_v$ represent the value for the test (variable of interest)

Concepts and formulas to use

We need to conduct a hypothesis in order to check if is there is a difference between the two proportions, the system of hypothesis would be:

Null hypothesis: $p_{1} = p_{2}$

Alternative hypothesis: $p_{1} \neq p_{2}$

We need to apply a z test to compare proportions, and the statistic is given by:

$z=\frac{p_{1}-p_{2}}{\sqrt{\hat p (1-\hat p)(\frac{1}{n_{1}}+\frac{1}{n_{2}})}}$ (1)

Where $\hat p=\frac{X_{1}+X_{2}}{n_{1}+n_{2}}=\frac{11+19}{50+40}=0.333$

z-test: Is used to compare group means. Is one of the most common tests and is used to determine whether the means of two groups are equal to each other.

3) Calculate the statistic

Replacing in formula (1) the values obtained we got this:

$z=\frac{0.22-0.475}{\sqrt{0.333(1-0.333)(\frac{1}{50}+\frac{1}{40})}}=-2.549$

8 0

4 years ago