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3 years ago

Please help with 27!!!!

Mathematics

1 answer:

Lina20 [59]3 years ago

5 0

It says the elevator's can hold minimum 3000 pounds and how many of a 150 pound box can fit without going over the 3000 pound.
So,
$150x \: \leqslant \: 3000$

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What is the value of 3-(-2)

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Which object is 3 1/2 inches loong

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The triangle below is equilateral. Find the length of side <br> x<br> x to the nearest tenth.

leonid [27]

Step-by-step explanation:

it's an equilateral triangle so all sides are equal

using Pythagorean theorem

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2 years ago

A data set includes data from student evaluations of courses. The summary statistics are nequals83, x overbarequals3.32, sequa

Andrews [41]

Answer:

Hypothesis

Null hypothesis: $\mu =3.50$

Alternative hypothesis: $\mu \neq 3.50$

Statistic

$t=\frac{3.32-3.50}{\frac{0.56}{\sqrt{83}}}=-2.928$

P value

The degrees of freedom are given by:

$df=n-1=83-1=82$

And the p value would be given by:

$p_v =2*P(t_{(82)}$

Conclusion

Since the p value is lower than the significance level of 0.05 we have enough evidence to reject the null hypothesis and we can conclude that the true mean is significantly different from 3.5

Step-by-step explanation:

Information given

$\bar X=3.32$ represent the sample mean

$s=0.56$ represent the sample deviation

$n=83$ sample size

$\mu_o =3.5$ represent the value to test

t would represent the statistic

$p_v$ represent the p value

System of hypothesis

We want to verify if the true mean is equal to 3.5, the system of hypothesis are:

Null hypothesis: $\mu =3.50$

Alternative hypothesis: $\mu \neq 3.50$

Statistic

The statistic would be given by:

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

Replacing we got:

$t=\frac{3.32-3.50}{\frac{0.56}{\sqrt{83}}}=-2.928$

P value

The degrees of freedom are given by:

$df=n-1=83-1=82$

And the p value would be given by:

$p_v =2*P(t_{(82)}$

Conclusion

Since the p value is lower than the significance level of 0.05 we have enough evidence to reject the null hypothesis and we can conclude that the true mean is significantly different from 3.5

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2 years ago

Yoko received a $70 gift card for a coffee store. She used it in buying some coffee that cost $8.62 per pound. After buying the

Jlenok [28]

Answer:

She bought 5 pounds of coffee.

Step-by-step explanation:

We are looking for how many pounds so pounds would be your x.

each pound costs $8.62.

You are taking the money she payed for the coffee away from the $70 she received.

Set up your equation

70 - 8.62x = 26.90

Solve for x

Subtract 70 from both sides 70-70 (Cancels out) - 8.62x= 26.90-70

-8.62x = -43.10

Divide -8.62 from each side. -8.62/-8.62(cancels out) x = -43.10/-8.62 (two negative numbers multiplied or divided by each other makes a positive)

x=5

6 0

3 years ago