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3 years ago

Can i get some help with this homework

Mathematics

2 answers:

natita [175]3 years ago

5 0

AC and BD is the right answer

nevsk [136]3 years ago

3 0

Answer:

A C AND B D

Step-by-step explanation:

See above for the answer

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The equation "c/5 + $1.00 = $9.00 can be used to find the total cost (including the delivery charge per person) for flowers purc

worty [1.4K]

<span>9-1 is 8 X 5 is 40, the answer is B.</span>

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3 years ago

90 POINTS: What is the slope of the line in the correct graph? What is the slope of the line in the incorrect graph? Are the slo

galben [10]

Answer:

Correct graph

$slope \frac{(175 - 105)}{(9 - 2)} \\ = \frac{70}{7} \\ = 10$

Incorrect graph

$slope = \frac{(175 - 105)}{(8 - 2)} \\ = \frac{70}{6} \\ = 11.7$

Slopes are not the same

5 0

3 years ago

Read 2 more answers

I WILL GIVE BRAINLIEST!!!!! HELP!!!!!!!!!!!!!!!!!!!!

Dvinal [7]

Answer:

448.50

Step-by-step explanation:

299/2 = 149.50

then you take 149.50* 3 to get your answer and that = 448.50

6 0

3 years ago

A market surveyor wishes to know how many energy drinks teenagers drink each week. They want to construct a 85% confidence inter

Gre4nikov [31]

Answer:

$7.3-1.440\frac{1.2}{\sqrt{830}}=7.240$

$7.3+1.440\frac{1.2}{\sqrt{830}}=7.360$

So on this case the 85% confidence interval would be given by (7.2;7.4)

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".

$\bar X=7.3$ represent the sample mean

$\mu$ population mean (variable of interest)

$\sigma =1.2$ represent the population standard deviation

n=830 represent the sample size

Solution to the problem

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

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

Since the Confidence is 0.85 or 85%, the value of $\alpha=0.15$ and $\alpha/2 =0.075$ , and we can use excel, a calculator or a table to find the critical value. The excel command would be: "=-NORM.INV(0.075,0,1)".And we see that $z_{\alpha/2}=1.440$