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3 years ago

Need help ASAP !!!!!!!!!!!

Mathematics

2 answers:

Lana71 [14]3 years ago

5 0

i think the answer b or c

i hope this help

tresset_1 [31]3 years ago

5 0

Answer: Choice C

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Work Shown:

m = Slope

m = (y2-y1)/(x2-x1)

m = (2-(-2))/(6-3)

m = (2+2)/(6-3)

m = 4/3

Point Slope Form

y-y1 = m(x-x1)

y-(-2) = (4/3)(x-3)

y+2 = (4/3)(x-3)

Convert to Standard Form

y+2 = (4/3)(x-3)

3(y+2) = 4(x-3)

3y+6 = 4x-12

-4x+3y = -12-6

-4x+3y = -18

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What is half of pi/3?

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Half of pi/3 means 1/2 times pi/3=pi/6

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2 years ago

Question Progress

Alik [6]

Answer:

60 ; - 40 ; 22 ; - 11

Step-by-step explanation:

Given that:

Number of questions = 20

Rules :

Every correct answer scores 3 points.

Each incorrect answer loses 2 points.

A question not answered scores 0 points.

It is possible to finish the quiz with a negative score.

Maximum score : answering all questions correctly :

(3 points * 20 questions)

= 3 * 20

= 60 points

Minimum score is obtainable by answering all questions incorrectly ;

(-2 points * 20)

= - 40 points

10 correct answers = (3 * 10) = 30 points

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d) Another student answers 18 questions,

5 are correct. How many points does she score?

5 correct answers = (5 * 3) = 15 points

(18 - 5) incorrect answers = (13 * - 2) = - 26 points

Net total = 15 + (-26) = - 11 points

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2 years ago

How do you write 4 hundredths,3 tenths, and 6 ones as a decimal?

Vsevolod [243]

The answer should be 6.34. This is because since the 6 is in the ones place, it should be the whole number. The 3 is a tenths so it should be the first number after the decimal. Finally, since 4 is in the hundredths place, it should be two places from the whole number.

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2 years ago

Read 2 more answers

Let F(x)=x^2-4 and G(x)=5-x<br><br> Find (F/G)(x)=

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Answer:(F/G)(x)=7

Step-by-step explanation:

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2 years ago

Crash Hospital Costs. A study was conducts to estimate hospital costs for accident victims who wore seat belts. Twenty randomly

kvv77 [185]

Answer:

a) The 99% confidence interval would be given by (5004.168;12603.832)

b) For this case we can use the lower bound for the confidence interval as estimation, on this case 5004.168. But we need to take in count that this value it's with 99% of confidence and 1% of significance and 1% of probability to commit type Error I

Step-by-step explanation:

1) 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".

$\bar X =9004$ represent the sample mean for the sample

$\mu$ population mean (variable of interest)

s=5629 represent the sample standard deviation

n=20 represent the sample size

2) Part a

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

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

In order to calculate the critical value $t_{\alpha/2}$ we need to find first the degrees of freedom, given by:

$df=n-1=20-1=19$

Since the Confidence is 0.99 or 99%, the value of $\alpha=0.01$ and $\alpha/2 =0.005$ , and we can use excel, a calculator or a table to find the critical value. The excel command would be: "=-T.INV(0.005,19)".And we see that $t_{\alpha/2}=2.86$

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

$9004-2.86\frac{5629}{\sqrt{20}}=5004.168$

$9004+2.86\frac{5629}{\sqrt{20}}=12603.832$

So on this case the 99% confidence interval would be given by (5004.168;12603.832)

3) Part b

For this case we can use the lower bound for the confidence interval as estimation, on this case 5004.168. But we need to take in count that this value it's with 99% of confidence and 1% of significance and 1% of probability to commit type Error I

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2 years ago