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2 years ago

HELP PLEASE ASAP MARKING BRAINLY

Mathematics

1 answer:

HACTEHA [7]2 years ago

8 0

1 and 4: Corresponding angles
1 and 3: Vertical angles
1 and 2/2 and 3/2 and 4: Supplementary angles
3 and 4: Alternate interior angles

With the knowledge that m∠1 = 81°, let's use these relationships to find the rest of the angles:

1 and 3 are vertical: their angle measures are the same, so m∠3 = 81°
1 and 4 are corresponding: their angle measures are also the same, so m∠4 = 81°
Finally, 1 and 2 are supplemental: their angle measures add up to 180°, so 81 + m∠2 = 180, making m∠2 = 99°

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Suppose John is a high school statistics teacher who believes that watching many hours of TV leads to lower test scores. Immedia

Hatshy [7]

This question is incomplete, the complete question is;

Suppose John is a high school statistics teacher who believes that watching many hours of TV leads to lower test scores. Immediately after giving the most recent test, he surveyed each of the 24 students in his class and asked them how many hours of TV they watched that week. He then matched each student's test grade with his or her survey response. After compiling the data, he used hours of TV watched to predict each student's test score. He found the least-squares regression line to be y" = -1.5x + 85.

He also calculated that the value of r, the correlation, was -0.61.

what is the correct value of the coefficient of determination R² and give a correct interpretation of its meaning

Answer:

Interpretation of coefficient of determination R² = 0.3721

R² = 0.3721, meaning 37.21% of the total variation in test scores can be explained by the least square regression line

Step-by-step explanation:

Given the data in the question;

the least square regression line is;

y" = -1.5x + 85

the correlation coefficient r = -0.61

Now, the coefficient of determination R² is square of correlation coefficient r

R² = -61²

R² = 0.3721

8 0

2 years ago

What is the fraction 2-5 2 on top and 5 on bottom ) equivalent to?

Andrei [34K]

To get to simplest form find the greatest common factor, or the gcf, of both numbers. To do that find all of the factors and find the one with the highest value both numbers share. So 30 would have factors of 1, 2, 3, 5, 6, 10, 15, and 30, and 42 would have the factors of 1, 2, 3, 6, 7, 14, 21, and 42. Both numbers share the factors of 1, 2, 3, and 6 so the gcf is 6. Now divide both numbers by six to get your answer.

Answer: 5/7

4 0

2 years ago

Find the value of x. X=

givi [52]

Answer:

x = 65

Step-by-step explanation:

The opposite angles of a cyclic quadrilateral sum to 180° , then

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x = 65

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2 years ago

Solve this system by substitution. y = 3 y = -3x + 6 *Remember to write your answer as a coordinate point (x, y). I

DochEvi [55]

Answer:

(1, 3)

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

Brackets
Parenthesis
Exponents
Multiplication
Division
Addition
Subtraction

Left to Right

Equality Properties

Multiplication Property of Equality
Division Property of Equality
Addition Property of Equality
Subtraction Property of Equality

Algebra I

Coordinates (x, y)
Solving systems of equations using substitution/elimination

Step-by-step explanation:

Step 1: Define Systems

y = 3

y = -3x + 6

Step 2: Solve for x

Substitute in y: 3 = -3x + 6
[Subtraction Property of Equality] Subtract 6 on both sides: -3 = -3x
[Division Property of Equality] Divide -3 on both sides: 1 = x
Rewrite/Rearrange: x = 1

Step 3: Solve for y

Define original equation: y = -3(1) + 6
Multiply: y = -3 + 6
Add: y = 3

6 0

2 years ago

Philip’s rectangular deck is 5 yards wide. The ratio of the width to the length is 4 to 5. What is the approximate length of Phi

VladimirAG [237]

Answer:

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Step-by-step explanation:

just convert 4 yards into feet

8 0

2 years ago

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