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3 years ago

Write inequalities WILL MARK BRAINLIEST!!!!!!!!!!!!!!!!!!!!!!

Mathematics

1 answer:

andreyandreev [35.5K]3 years ago

7 0

84-12x<=18 (that is a less than or equal to)

4+x<=15

500<=363+x

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Which equation represents the graph led function?

GalinKa [24]

Answer: y = -1/3x +3

Step-by-step explanation:

When you plug in ( 3,2) in the equation.

Like -1/3 times 3 + 3 you will get 2 which is Y.

Then to get X which is 3 is 2-3/-1/3 =3 or -1/-1/3 = 3

3 0

3 years ago

When comparing answers on a group assignment, Jenny and Jeremy found that their answers did not match.

WINSTONCH [101]

Jenny has the correct solution for the group assignment. It is evident in her response because she uses the correct percentage of 41/100. Unlike Jeremy who uses 41/99. When using fractions or decimals the numerical range always extends to 100.

The decimal number would be 0.41.

6 0

4 years ago

A survey shows that college students spend on average about $20 per month on Yum Good Ramen. a. Assume that the survey was condu

lawyer [7]

Answer:

a) The 95% confidence interval would be given by (19.168;20.832)

b) The 95% confidence interval would be given by (19.182;20.416)

c) The 95% confidence interval would be given by (19.412;20.588)

Step-by-step explanation:

Previous concepts

A confidence interval is "a range of values that’s likely to include a population value with a certain degree of confidence. It is often expressed a % whereby a population means lies between an upper and lower interval".

The margin of error is the range of values below and above the sample statistic in a confidence interval.

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

$\bar X$ represent the sample mean

$\mu$ population mean (variable of interest)

$\sigma$ represent the population standard deviation

n represent the sample size

Part a

The confidence interval for the mean is given by the following formula:

$\bar X \pm z_{\alpha/2}\frac{\sigma}{\sqrt{n}}$ (1)

Since the Confidence is 0.95 or 95%, the value of $\alpha=0.05$ and $\alpha/2 =0.025$ , and we can use excel, a calculator or a table to find the critical value. The excel command would be: "=-NORM.INV(0.025,0,1)".And we see that $z_{\alpha/2}=1.96$

Now we have everything in order to replace into formula (1):

$20-1.96\frac{6}{\sqrt{200}}=19.168$

$20+1.96\frac{6}{\sqrt{200}}=20.832$

So on this case the 95% confidence interval would be given by (19.168;20.832)

Part b

For this case we just need to change the value for the deviation

$20-1.96\frac{3}{\sqrt{200}}=19.584$

$20+1.96\frac{3}{\sqrt{200}}=20.416$

So on this case the 95% confidence interval would be given by (19.182;20.416)

Part c

For this case we change again the deviation and the sample size.

$20-1.96\frac{6}{\sqrt{400}}=19.412$

$20+1.96\frac{6}{\sqrt{400}}=20.588$

So on this case the 95% confidence interval would be given by (19.412;20.588)

7 0

3 years ago

How to sustitute 6n+2f=736 and 10n+2f=920

Ahat [919]

Notice that both equation has a 2f term in them

solve for 2f for both eqs.

2f= 736-6n
2f= 920-10n

since they both equal to 2f, yo can set them equal to each other

736-6n = 920-10n

and solve for n if you want

6 0

4 years ago

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A pair of shoes is on sale for 15% off. With this discount,customers will save $9 if they buy the shoes.

jekas [21]

Answer:12.54

Step-by-step explanation:

5 0

3 years ago

Read 2 more answers