MATHEMATICS COLLEGE

Find the slope of the line that passes through the point (0,-3) and (4,5)

Slope=?

Answers

Answer 1

Answer: It depends which pair goes first but the formula is Y2-y1 over x2-x1

Answer 2

Answer:

Answer: $m=2$

(0,-3) = (x1,y1)

(4,5) = (x2,y2)

Slope = $(y2-y1)/(x2-x1)$

= $(5-(-3))/(4-0)$

= $(5+3)/(4)$

= $(8)/(4)$

= $2$

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Suppose the correlation coefficient between a predictor variable (a person’s height, measured in centimeters) and a response variable (a person’s weight, measured in kilograms) is 0.72.Suppose that we change the units used to measure height from centimeters to inches and the units used to measure weight from kilograms to pounds, and then we recompute the correlation coefficient. Which of the following would be true?Select one:a. The new correlation coefficient should be the same: R = 0.72.b. The new correlation coefficient should be R = 0.72 × (2.54/2.2) ≈ 0.83.c. The new correlation coefficient should be R = 0.72 × (2.2/2.54) ≈ 0.62.d. The new correlation coefficient should be something other than the options given here.
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The sum of the squares of two consecutive odd positive integers is 74. Find the integers.

Please help me with number 7 and 8 and explain both of them how you got it. Will mark the brainliest!

Answers

7. No this isnt possible only a irregular shape, a square or a rectangle.
8. True. it has 4 equal sides and 4 equal angles.

You are to take a multiple-choice exam consisting of 100 questions with 5 possible responses to each question. Suppose that you have not studied and so must guess (select one of the five answers in a completely random fashion) on each question. Let x represent the number of correct responses on the test. (a) What is your expected score on the exam? (Hint: Your expected score is the mean value of the x distribution.) (b) Compute the variance and standard deviation of x. Variance = Standard deviation =

Answers

Answer:

a) 20

b) Variance 16, standard deviation 4

Step-by-step explanation:

For each question, there are only two possible outcomes. Either you guesses the answer correctly, or you do not. The probability of guessing the answer of a question correctly is independent of other questions. So we use the binomial probability distribution to solve this question.

Binomial probability distribution

Probability of exactly x sucesses on n repeated trials, with p probability.

The expected value of the binomial distribution is:

$E(X) = np$

The variance of the binomial distribution is:

$V(X) = np(1-p)$

The standard deviation of the binomial distribution is:

$√(V(X)) = √(np(1-p))$

100 questions

So n = 100.

You guess

5 options, one correct. So $p = (1)/(5) = 0.2$

(a) What is your expected score on the exam?

$E(X) = np = 100*0.2 = 20$

(b) Compute the variance and standard deviation of x.

Variance:

$V(X) = np(1-p) = 100*0.2*0.8 = 16$

Standard deviation:

$√(V(X)) = √(16) = 4$

Calculate 188 meters___________Yards

Answers

Answer:

205.599

Step-by-step explanation:

Answer:

205.599 yards

Step-by-step explanation:

1 meter = 1.09361 yards

Multiply 188 meters by 1.09361 yards

188 meters = (1.09361 yards) x (188 meters)

= 205.599 yards

Sofia bought a clothes iron that was discounted 15% off of the original price of $35. What was the sale price of the clothes iron?

Answers

Answer:

35 - 0.15 * 35 so it is $29.75

Step-by-step explanation:

I got u

Answer:

$29.75

Step-by-step explanation:

15% = .15

.15 x 35 = 5.25

35 - 5.25 = 29.75

-13 = n/9 - 14

it's due in a couple of minutes, pls help me :(

Answers

-9. first, add 14 on both sides = “-1=n/9
-9/9=-1

Answer:

$n = 9$

Step-by-step explanation:

1) Add 14 to both sides.

$- 13 + 14 = (n)/(9)$

2) Simplify-13 + 14 to 1

$1 = (n)/(9)$

3) Multiply both sides by 9.

$1 * 9 = n$

4) Simplify 1 × 9 to 9.

$9 = n$

5) Switch sides.

$n = 9$

Therefor,theanswerisn=9.

Who can access your credit report?a friends
b. employers
c. neighbors
d. teachers
Please select the best answer from the choices provided.
Ο Α
С В
ОС
D