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3 years ago

What equation does this model show?

Mathematics

1 answer:

Fiesta28 [93]3 years ago

4 0

Answer:

14x-12=9x-25

Step-by-step explanation:

Since the balance is equaled, the equation would read to be 14x-12=9x-25.

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The length of a rectangle is 4 more than its width. The area of the rectangle is 21m2 . What is the measure of the width?

nadezda [96]

The width is 3m because 3*7 is 21m^2. Also they said the length is 4 more than the width (3+4=7)

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3 years ago

Which teacher exhibited the most variable year to year performance over this 5 year span?

kupik [55]

Please provide the graph that represents the performance of the teacher over the span of 5 years.

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4 years ago

Question 2 of 39

rewona [7]

Answer:

D) 32

Step-by-step explanation:

Given;

series: 56, 54, 50, 38, 34, ....

find the difference between successive numbers;

56 54 50 38 34 x

2 4 12 4 2

The highest difference between the numbers is 12, after which it decreases to 4 and finally back 2.

The next number "x" is calculated as;

34 - 2 = x

32 = x

Therefore, the next number should be 32.

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3 years ago

A manufacturer of banana chips would like to know whether its bag filling machine works correctly at the 430 gram setting. It is

Leto [7]

Answer:

$t=\frac{435-430}{\frac{29}{\sqrt{23}}}=0.827$

The degrees of freedom are given by:

$df=n-1=23-1=22$

And the p value taking in count that we have a bilateral test we got:

$p_v =2*P(t_{(22)}>0.827)=0.417$

Since the p value is higher than the significance level of 0.05 we have enough evidence to conclude that the true mean is not significantly different from 430 the required value

Step-by-step explanation:

Information given

$\bar X=435$ represent the mean for the weight

$s=\sqrt{841}=29$ represent the sample standard deviation

$n=23$ sample size

$\mu_o =430$ represent the value that we want to verify

$\alpha=0.05$ represent the significance level

t would represent the statistic

$p_v$ represent the p value

System of hypothesis

We are trying to proof if the filling machine works correctly at the 430 gram setting, so then the system of hypothesis for this case are:

Null hypothesis: $\mu = 430$

Alternative hypothesis: $\mu \neq 430$

In order to cehck the hypothesis the statistic for a one sample mean test is given by

$t=\frac{\bar X-\mu_o}{\frac{s}{\sqrt{n}}}$ (1)

Replacing the info given we have this:

$t=\frac{435-430}{\frac{29}{\sqrt{23}}}=0.827$

The degrees of freedom are given by:

$df=n-1=23-1=22$

And the p value taking in count that we have a bilateral test we got:

$p_v =2*P(t_{(22)}>0.827)=0.417$

Since the p value is higher than the significance level of 0.05 we have enough evidence to conclude that the true mean is not significantly different from 430 the required value

8 0

3 years ago

Original price: $26<br> Sales tax: 3%

zubka84 [21]

Answer:

$25.22

Step-by-step explanation:

26 x .03= 0.78

26-0.78= $25.22

i hope this helps :)

8 0

3 years ago