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2 years ago

Rewrite the expression without parentheses. 13m−(-8m-5)

Mathematics

1 answer:

soldier1979 [14.2K]2 years ago

6 0

Answer:

21m+5

Step-by-step explanation:

13m-(-8m-5)

13m+8m+5

21m+5

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A software company decided to conduct a survey on customer satisfaction. Out of 564 customers who participated in the online sur

nikklg [1K]

Answer:

$z=\frac{0.0904 -0.1}{\sqrt{\frac{0.1(1-0.1)}{564}}}=-0.760 \approx -0.8$

$p_v =2*P(z$

Step-by-step explanation:

Information given

n=564 represent the sample selected

X=51 represent the number of people who rated the overall services as poor

$\hat p=\frac{51}{564}=0.0904$ estimated proportion of people who rated the overall services as poor

$p_o=0.1$ is the value to compare

z would represent the statistic

Hypothsis to analyze

We want to analyze if the proportion of customers who would rate the overall car rental services as poor is 0.1, so then the system of hypothesis are:

Null hypothesis: $p=0.1$

Alternative hypothesis: $p \neq 0.1$

The statistic for a one z test for a proportion is given by:

$z=\frac{\hat p -p_o}{\sqrt{\frac{p_o (1-p_o)}{n}}}$ (1)

Replacing the info given we got:

$z=\frac{0.0904 -0.1}{\sqrt{\frac{0.1(1-0.1)}{564}}}=-0.760 \approx -0.8$

And the p value since we have a bilateral test is given b:

$p_v =2*P(z$

3 0

3 years ago

Ella is a landscape photographer. One weekend at her art gallery she sells a total of 52 prints for a total of $2,975. How many

abruzzese [7]

Answer:

Ella sold the each print for the cost of $57.21.

Step-by-step explanation:

The total number of prints sold at gallery = 52

Total amount it is sold for = $2,975

Noe, If 52 prints are sold for $2,975.

⇒ $\textrm{Cost of 1 print} = \frac{\textrm{Total cost of 52 prints}}{\textrm{52}}$

$= \frac{2,975}{52} = 57.21$

or, Cost of 1 print = $57.21

So, Ella sold the each print for the cost of $57.21.

4 0

3 years ago

Is 3/4 a rational number

Verizon [17]

Hello,

<em>3/4 is a rational number because it can be written as a fraction.</em>

Thanks,

6 0

3 years ago

PLEASE HELP!!! BRAINLIESt!! THANK YOUU

vredina [299]

Answer:

Step-by-step explanation:

7 0

3 years ago

Read 2 more answers

If f(x) = 3 ^ x - 4 what is f(- 2) ?

Karolina [17]

Answer:

-35/9

Step-by-step explanation:

(3^-2)-4

1/9-4

-35/9

8 0

3 years ago

Rewrite the expression without parentheses. 13m−​(-8​m-5)

Rewrite the expression without parentheses. 13m−(-8m-5)