Mathematics College

(c) Use a calculator to verify that Σ(x) = 64, Σ(x2) = 1118, Σ(y) = 628, Σ(y2) = 87,982, and Σ(x y) = 9,627.

Compute r. (Enter a number. Round your answer to three decimal places.)

Answers

Answer 1

The correlation based on the computation is 0.97.

How to compute the value?

It should be noted that the question is that we should simply calculate the correlation which is r.

The correlation will be:

= Σ(x y) / (Σ(x²) × Σ(y²)

= 9627/✓(1118 × 87982)

= 9627 ✓98363876

= 9627/9917.86

= 0.97

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Related Questions

What is the probability of randomly selecting a card from a standard 52 card deck and having the card be a face card or an even numbered card?

A) 5.16
B) 16.5
C) .165
D) .615

Answers

I think c but don’t take my word

Whats the y-intercept of the line x + 6y = -18

Answers

Answer:

18

Step-by-step explanation:

Answer:

it's −3

Step-by-step explanation:

each of two equal angles is twice the third angle. find the angle of triangle.​

Answers

Answer:

45 degrees each and 90 degrees

In ΔKLM, k = 13 cm, l = 17 cm and m=28 cm. Find the measure of ∠K to the nearest degree.

Answers

Answer:

18

Step-by-step explanation:

Delta math

Answer:

18

Step-by-step explanation:

delta math

if (a+b)+(a-b)i=7+2 find a and b​

Answers

Answer:

a = 4.5

b = 2.5

Step-by-step explanation:

The question is incomplete.

Complete question

If (a+b)+(a-b)i=7+2i find a and b

Compare the terms on both sides

a+b = 7

a-b = 2

Add both equations

a+a = 7+2

2a = 9

a = 9/2

a = 4.5

Recall:.

a+b = 7

4.5+b = 7

b = 7-4.5

b = 2.5

Find the length of AB when A(-4,1) and B(3,-1). Round to the nearest tenth (one decimal place) if necessary.

Answers

Answer:

7.3 units is the answer rounded

When A(-4,1) and B(3,-1), the length of AB is approximately 7.3 units.

What is distance formula?

The distance formula is a mathematical formula that is used to compute the distance between two points in a coordinate plane.

This formula is derived from the Pythagorean theorem, which states that the square of the length of the hypotenuse in a right triangle equals the sum of the squares of the lengths of the other two sides.

We can use the distance formula to find the length of AB:

[tex]d = \sqrt{ ((x2 - x1)^2 + (y2 - y1)^2)}[/tex]

Where (x1, y1) = (-4, 1) and (x2, y2) = (3, -1)

d = sqrt([tex](3 - (-4))^2 + (-1 - 1)^2[/tex])

= sqrt([tex]7^2 + (-2)^2[/tex])

= sqrt(49 + 4)

= sqrt(53)

≈ 7.3 (rounded to one decimal place)

Therefore, the length of AB is approximately 7.3 units.

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5/7 times 1/6 ANSWER IN UNDER 2 MINUTS AND ILL MAKE YOU BRAINLIEST

Answers

Answer: GIVE ME BRAINLIEST the answer is 5/42

Step-by-step explanation:

Answer:

5/42

Step-by-step explanation:

It's simple multiplication, just multiply across.

PLS ANSWER ASAP THIS QUESTION IS WORTH ABOUT 50 POINTS PLS ANSWER PROPERLY PLS PLS

Raul paid $48 for a sweater. He also paid a 7% sales tax. How much was the tax and what was they total cost

Answers

Answer:

Tax: $3.36

Total Cost: 51.36

Step-by-step explanation:

First, we need to figure out the tax, which is 7% of 48. Meaning that the tax is $3.36. Then, we add that to the cost of the sweater which is $48, which means that the total cost is 3.36 + 48 = $51.36

Plz mark as brainliest :D

An angle measures 9.4° more than the measure of its complementary angle. What is the measure of each angle?

Answers

Answer:

x = one angle

90 - x = complementary angle {complementary angles add up to 90�}

x = 90 - x + 86 {one angle is 86� more than its complementary angle}

x = -x + 176 {combined like terms on right}

2x = 176 {added x to each side}

x = 88 {divided each side by 2}

90 - x = 2 {substituted 88, in for x, into 90 - x}

one angle is 88�

the complementary angle is 2�

Step-by-step explanation:

Solve the Antiderivative. ​

Answers

... 1
∫-------- dx
√2x-x²

... 1
∫------------------dx
√( 1-(x-1)² )

let u = x-1
du = dx

... 1
∫------------------ du
√( 1-u² )

= arcsin(u)
= arcsin (x-1)

6(a+4)+1 use the distributive property

Answers

Answer:

6a + 25

Step-by-step explanation:

6a + 24 + 1

6a + 25

Hope that helps!

Answer:

6a + 25

Step-by-step explanation:

hope it helps

HELP ASAP PLS!!! ONLY HAVE 10 MINUTES LEFT TO FINISH

Answers

Answer:

Step-by-step explanation:

The graph gave us two points: (5,0)(0,1)

Let’s find the slope!

1-0/0-5

slope is 1/-5

y=-1/5x+b

Choose one point and plug it into x and y

1=-1/5(0)+b

1=0+b

b=1

y=-1/5x+1

Answer:

y=-1/5x+1

Step-by-step explanation:

A restaurant bought 5 pounds of salmon for $42.50. How much would 7 pounds of salmon cost? *

Answers

Answer:

59.5

Step-by-step explanation:

42.50/5=8.5

1 lb=8.5

7lb=7*8.5=59.5

16/20 – 1/4 =


I need help please thank you

Answers

Answer:

11 / 20

Step-by-step explanation:

16 / 20 - 1×5 / 4×5

16 / 20 - 5 / 20

16 - 5 / 20

= 11 / 20

first time taking a picture but some one help me, this is the last question and I want to die.​

Answers

Answer:

Step-by-step explanation:

The average temperature on the surface of the earth is 15 degrees. On the surface of Mars, the average temperature is -50 degrees. What is the difference in these two temperatures? degrees​

Answers

Answer:

65

Step-by-step explanation:

the difference is 65 degrees fahrenheit

in a school 3/8 students are boys and 850 are girls.fi nd the number of boys in the school
I​

Answers

Answer:

Answer: Not too Sure... Maybe 318

BRAINLIEST TO BEST ANSWER :D
Ali was asked to simplify the expression 3(x - 6) + (4x + 12) - 6x. His work is shown below.


3(x - 6) + (4x + 12) - 6x

3x - 9 + 4x + 12 - 6x

(3x + 4x - 6x) + (-9 + 12)

x + 3

Question 1
Identify the line which contains the error.
A 3(x - 6) + (4x + 12) - 6x
B 3x - 9 + 4x + 12 - 6x
C (3x + 4x - 6x) + (-9 + 12)
D x + 3

Answers

Answer:

C

Step-by-step explanation:

Answer:hope this helps!!! :)

defenitly A it equals x-6 not x-3

3(x - 6) + (4x + 12) - 6x  =>   − 6

Step-by-step explanation:

The first term of a gemotetric sequence is -15 and the common ratio is 6 What is the twelfth term of the sequence

Answers

Answer:

Step-by-step explanation:

a₁₂ = a₁r¹²⁻¹ = -15×6¹¹

-5/6+1/4

Simplify if needed
Brainliest

Answers

Answer:

-7/12

Step-by-step explanation:

-5/6 + 1/4 (LCM is 12)

-10/12 + 3/12

-7/12

Find the solutions of each equation on the interval [0, 2π)
​

Answers

Answer/Step-by-step explanation:

Factor this. GCF=2

2(2cos2x+cos x-1)=0

2(2cos x -1)(cos x+1)=0 Set each factor equal to zero and solve

2cos x -1=0 Add 1 to both sides

2cos x =1 Divide by 2

cos x =1/2

x=π/3

x=5π/3

cos x+1=0 Subtract 1 from both sides

cos x=-1

x = π

Evaluate
28.47% of 637.38cm
Give your answer rounded to 2 DP.
cm

Answers

Answer: 181.46 cm.

Step-by-step explanation: The real answer is 181.462086 cm but we can round that to 2 decimal places.

637.38 × 28.47/ 100

= 181.46

Mr.Jones can bench 205 pounds. The bar weighs 45 pounds, how much weight is on each side

Answers

Answer:

205-45÷2

Step-by-step explanation:

205-45=160

160÷2=80

80lb

13. Jannah purchased flowers to plant in
her garden. She planted 2 flowers in
each of her 5 flower beds plus 8 flowers
around a pond. Write an expression
that shows how many flowers Jannah
planted.

Answers

Answer:

2x5=10+8

Step-by-step explanation:

my answer need to be 20 characters long so I had to write this too

If 3x = 6, then x = 2.
a. Addition b. Subtraction c. Square root d. Division

Answers

Answer:

Its D. Division

Step-by-step explanation:

Because you have to divide 3 from x and also to 6 and you will get x equals 2.

The answer is d. Division.

Explanation:

3x = 6

3x/3 = 6/3 {Divided by 3}

x = 2

Hope it helps!

A trial balance has total debits of $36,000 and total credits of $48,500. Which one of the following errors would create this imbalance?

A.) A $6,250 debit to utilities expense in a journal entry was incorrectly posted to the ledger as a $6,250 credit, leaving the utilities expense account with a $7,000 debit balance.

B.) A $12,500 debit to salaries expense in a journal entry was incorrectly posted to the ledger as a $12,500 credit, leaving the salaries expense account with a $2,350 debit balance.

C.) A $6,250 credit to consulting fees earned (revenues) in a journal entry was incorrectly posted to the ledger as a $6,250 debit, leaving the consulting fees earned account with a $14,300 credit balance.

D.) A $6,250 debit posting to accounts receivable was posted mistakenly to land.

E.) A $12,500 debit posting to equipment was posted mistakenly to cash.

F.) An entry debiting cash and crediting accounts payable for $12,500 was mistakenly not posted.


Please answer which one is it. Thank you!

Answers

Answer:

__________

Step-by-step explanation:

Is the answer A?

x + 5 x < -2 4 – x2 -2 ​

Answers

x2  < −6x − 26

x < -x2/6 - 13/3

Suppose an amusement park bought a merry‐go‐round for $92,000. 42,512 people paid $2 each to ride the merry‐go‐round in its first year of operation. Did the park earn or lose money in the first year? How much?

Answers

Answer:

yes they did lose money

Step-by-step explanation:

42,512×2 = 85,024

92,000 - 85,024 = 6,976

they lost $6,976 in the first year

Write the equation of the line in slope intercept form that given f(- 3) = 5 and f(3)=-3,

Answers

Step-by-step explanation:

the first coordinate is (-3 5),

x+3y -12 the second coordinate is (3, 3)

y= -1/3x +4

Solve seven tenths times two fourths

Answers

7/20 or 0.35 I believe

Answer:

with simplify: 1 4/20.

without simplify: 24/20

Step-by-step explanation:

first we have to find the common denominator

can 4 go into 10? no.

can 4 go into 20? yes! it goes into 20, 5 times!

common denominator = 20

_/20 + _/20

what we do to the bottom we do to the top

7 x 2= 14

14/20 + _/20

2 x 5= 10

14/20 + 10/20 = 24/20

now simplify

1 4/20

hope this helped!

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