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2 years ago

Which statements are true about the figures? Select three options.

Mathematics

2 answers:

KIM [24]2 years ago

8 0

Answer:

onbenglo desi sandino gorbanfino del gato bolimia de shano bo di si gel di vanto jorn banto

Step-by-step explanation:

Lesechka [4]2 years ago

4 0

It’s the ratio of pt to p’t’ is

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Jessica and Emily each improved their yards by planting daylilies and ivy. They bought their supplies from the same store. Jessi

Darya [45]

Answer:The cost of one daylily is 6, and the cost of one pot of ivy is 8.

Step-by-step explanation:

7 0

3 years ago

Last question pls help :))

AURORKA [14]

Answer:

4/5

Step-by-step explanation:

6 0

2 years ago

How to subtract fractions with unlike denominators khan academy?

Finger [1]

First find the LCD of the denominators then convert the fractions. Then you can subtract.

for example

2/7 - 1/4

LCD of 4 and 7 is 28 so we convert to fractions with denominator 28

1/4 = 1*7 / 4*7 = 7 /28

2/7 = 2*4 / 7*4 = 8/28

so 2/7 - 1/4 = 8 /28 / 7/28 = 1/28 answer

6 0

3 years ago

In order to estimate the difference between the average hourly wages of employees of two branches of a department store, the fol

uysha [10]

Answer:

$(9-8) -2.02 \sqrt{\frac{2^2}{25} +\frac{1^2}{20}}= 0.0743$

$(9-8) +2.02 \sqrt{\frac{2^2}{25} +\frac{1^2}{20}}= 1.926$

And we are 9% confidence that the true mean for the difference of the population means is given by:

$0.0743 \leq \mu_1 -\mu_2 \leq 1.926$

Step-by-step explanation:

For this problem we have the following data given:

$\bar X_1 = 9$ represent the sample mean for one of the departments

$\bar X_2 = 8$ represent the sample mean for the other department

$n_1 = 25$ represent the sample size for the first group

$n_2 = 20$ represent the sample size for the second group

$s_1 = 2$ represent the deviation for the first group

$s_2 =1$ represent the deviation for the second group

Confidence interval

The confidence interval for the difference in the true means is given by:

$(\bar X_1 -\bar X_2) \pm t_{\alpha/2} \sqrt{\frac{s^2_1}{n_1}+\frac{s^2_2}{n_2}}$

The confidence given is 95% or 9.5, then the significance level is $\alpha=0.05$ and $\alpha/2 =0.025$ . The degrees of freedom are given by:

$df=n_1 +n_2 -2= 20+25-2= 43$

And the critical value for this case is $t_{\alpha/2}=2.02$

And replacing we got:

$(9-8) -2.02 \sqrt{\frac{2^2}{25} +\frac{1^2}{20}}= 0.0743$

$(9-8) +2.02 \sqrt{\frac{2^2}{25} +\frac{1^2}{20}}= 1.926$

And we are 9% confidence that the true mean for the difference of the population means is given by:

$0.0743 \leq \mu_1 -\mu_2 \leq 1.926$

4 0

2 years ago

How much tomato juice is needed for a group of four people if each person gets 1/3 cup of juice how much tomato juice is needed

Ivanshal [37]

Answer:

$1\frac{1}{4} \ cups \ of \ juice$ , $2\frac{2}{3}\ cups \ of \ juice$

Step-by-step explanation:

Given:

Number of people in a group = 4

Each person gets cup of juice = $\frac{1}{3}$

Question asked:

How much tomato juice is needed for a group of four people ?

How much tomato juice is needed if they each get 2/3 cup of juice ?

Solution:

<u>Unitary method:</u>

In case of each person gets $\frac{1}{3}$ up of juice.

1 person gets cup of juice = $\frac{1}{3}$

4 persons gets cup of juice = $\frac{1}{3} \times4=\frac{4}{3} =1\frac{1}{3} \ cup \ of\ juice$

Therefore, $1\frac{1}{4} \ cups \ of \ juice$ is needed for a group of four people.

In case of each person gets $\frac{2}{3}$ cup of juice.

1 person gets cup of juice = $\frac{2}{3}$

4 persons gets cup of juice = $\frac{2}{3}\times4=\frac{8}{3} =2\frac{2}{3} \ cups\ of \ juice$

Thus, $2\frac{2}{3}$ cups of tomato juice is needed if they each get $\frac{2}{3}$ cup of juice.

7 0

3 years ago