Answer: 1/4 is one quarter in fractions
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
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
Help Me as quick as possible ty
Answer: 4/2
Step-by-step explanation:
Answer:
5 It is 10 over 2
Step-by-step explanation:
reduce the numbers
Type the correct answer in each box.
Consider the expressions shown below.
А.
B
C с
-872
-
3.5 + 4812
3r + 8 8r2 + 3r
4
Complete each of the following statements with the letter that represents the expression.
-
(3x2 7x + 14) + (5x2 + 41 6) is equivalent to expression
(2x2 – 5x – 3) + (-10x2 + 2x + 7) is equivalent to expression
(12t2 – 2x – 13) + (-4x2 + 5x + 9) is equivalent to expression
Answer/Step-by-step explanation:
✔️(3x² - 7x + 14) + (5x² + 4x - 6)
3x² - 7x + 14 + 5x² + 4x - 6 (distributive property)
Add like terms
3x² + 5x² - 7x + 4x + 14 - 6
8x² - 3x + 8
Therefore:
✅(3x² - 7x + 14) + (5x² + 4x - 6) is equivalent to expression 8x² - 3x + 8.
✔️(2x² - 5x - 3) + (-10x² + 2x + 7)
2x² - 5x - 3 - 10x² + 2x + 7 (distributive property)
Add like terms
2x² - 10x² - 5x + 2x - 3 + 7
-8x² - 3x + 4
Therefore:
✅(2x² - 5x - 3) + (-10x² + 2x + 7) is equivalent expression to -8x² - 3x + 4
✔️(12x² - 2x - 13) + (-4x² + 5x + 9)
12x² - 2x - 13 - 4x² + 5x + 9
12x² - 4x² - 2x + 5x - 13 + 9
8x² + 3x - 4
Therefore:
✅(12x² - 2x - 13) + (-4x² + 5x + 9) is equivalent expression to 8x² + 3x - 4
Answer:
B, A, C
Step-by-step explanation:
A square has a perimeter of 12x^4 + 36x^3 inches. What is the length of each side?
Answer:
3x^4+9x^3
Step-by-step explanation:
Perimeter of a square is expressed as;
P = 4L
L is the length of each side
Given
P = 12x^4 + 36x^3
12x^4 + 36x^3 = 4L
4(3x^4+9x^3) = 4L
Divide both sides by 4
4(3x^4+9x^3)/4 = 4L/4
(3x^4+9x^3) = L
L = 3x^4+9x^3
Hence the length of each side is 3x^4+9x^3
Nathan needs to order some new supplies for the restaurant where he works. The restaurant needs at least 571 forks. There are currently 361 forks. If each set on sale contains 10 forks, use the drop-down menu below to write an inequality representing
Answer:
Nathan must order 21 sets of forks for the restaurant.
Step-by-step explanation:
Since Nathan needs to order some new supplies for the restaurant where he works, and the restaurant needs at least 571 forks since there are currently 361 forks, if each set on sale contains 10 forks, to determine the number of sets to buy you must perform the following calculation:
(571 - 361) / 10 = X
210/10 = X
21 = X
So Nathan must order 21 sets of forks for the restaurant.
Floyd is an aspiring music artist. He has a record contract that pays him a base rate of $200 a month and an additional $12 for each album that he sells. Last month he earned a total of $644
Write an equation to determine the number of albums (a)left parenthesis, a, right parenthesis Floyd sold last month.
Find the number of albums Floyd sold last month.
A camp program charges a registration fee and a daily amount.
The total bill for 12 days is $338. The total bill for 19 days is
$506. Slope can be represented by cost per day. Use x as the
number of days and y as the total cost to represent this
situation.
a. Find the slope for this situation. What does it represent?
b. Write a linear equation that models this situation.
Using the information given, it is found that:
a) The slope is of 24, which means that for each day, the total bill increases by $24.b) The linear equation is: [tex]y = 24x + 50[/tex]Linear functions:A linear function is modeled by:
[tex]y = mx + b[/tex]
In which:
m is the slope, which is the rate of change, that is, by how much y changes when x changes by 1.b is the y-intercept, which is the value of y when x = 0.Item a:
The total bill for 12 days is $338.The total bill for 19 days is $506.The slope is given by the change in y(total bill) divided by the change in x(number of days), hence:
[tex]m = \frac{506 - 338}{19 - 12} = 24[/tex]
The slope is of 24, which means that for each day, the total bill increases by $24.
Item b:
The total bill for 12 days is $338, hence, when [tex]x = 12, y = 338[/tex], and this is used to find b.[tex]y = 24x + b[/tex]
[tex]338 = 24(12) + b[/tex]
[tex]b = 50[/tex]
Hence, the linear equation is: [tex]y = 24x + 50[/tex]
You can learn more about linear functions at https://brainly.com/question/25823744
Which shows the equation below written in the form ax^2+bx+c=0. x+9=4(x-1)^2
Answer:
[tex]4x^2 - 9x - 5 = 0[/tex]
Step-by-step explanation:
To place the equation in standard form, we expand the operations. So
[tex]4(x-1)^2 = x + 9[/tex]
[tex]4(x^2-2x+1) = x + 9[/tex]
[tex]4x^2 - 8x + 4 - x - 9 = 0[/tex]
Combining the like terms:
[tex]4x^2 - 9x - 5 = 0[/tex]
helpppppp ill give brainliest answer if you know
Answer:
280 in^3
Step-by-step explanation:
Basically, volume is length*width*height (length*width = base area)
So, you just multiple 10, 4, and 7 together. 4 * 7 = 28, and 28 * 10 is 280. Don't forget to make the units cubed (in^3)!
23 + 7 + 15 =
Simplify each expression. Justify each step
Someone help me please!
Answer:
ACD
Step-by-step explanation:
PLZZ mark brainliest!!
Answer:
D i think i havent done this in a while
Step-by-step explanation:
HELP ASAP WHAT IS THIS ANSWER
Answer:
Step-by-step explanation:
x = 1/2 ( a + b)
x = 1/2 (129 + 71)
x = 1/2 (200)
x = 100 °
you just have to remember that formula
write two ways you could use to find 5+8
Answer:
RETSANDO
DIVDIEINDO
ECUACIONES
Step-by-step explanation:
PLEASE HELP I WILL GIVE BRAINLIEST IF YOU GET IT RIGHT 7TH GRADE MATH
Answer:
Need the problem in order to help
Step-by-step explanation:
Solve for x
-8+6(-x-3)+4x
-x-26 This is the answer
What is 1 2/3 divided by 1/8
Answer:
13 1/3 is the answer
Step-by-step explanation:
5/3 ×8 =40/3=13 1/3
Answer:
13 1 /3
Step-by-step explanation:
1 2 /3 ÷ 1 /8 = 5 /3 ÷ 1/ 8 =
5 /3 × 8 /1
= 5 × 8
3 × 1 = 40 /3 = 13 1 /3
Solve equation step by step...
6x+13y=15
Helllllllpppppp please help me
Answer:
i think maybe j that is what I think
Ages of Students
All students in an after school martial arts class were
asked their age. The dot plot shows the results of the
survey. How many students were surveyed?
А50 students
C 11 students
B16 students
D 7 students
Find X for the solution
Step-by-step explanation:
good lucks
giving brainliest *easy*
Answer:
(4/3)π m³
Step-by-step explanation:
Volume of sphere = (4/3)πr³
= (4/3)π(1³)
= (4/3)π m³
Answer:
Step-by-step explanation: The formula for the volume of a sphere is 4/3 pi(r)^3, and when you plug in the radius (r=1) into the formula Hope this helps!
Write the percent as a fraction or mixed number in lowest term 74 3/8%
Answer:
222/2 = 111
8/2 = 4
74 /1
Step-by-step explanation:
2.57 as a improper fraction
Answer: 2 57/100 hope that helps
you my kids is doing 4 grade math i didnt go to school for all the years but are they doing in 4 grade
Answer:
Multiplication, Division, Fractions, Decimals, Multipling Fractions, Divide Large Numbers
Step-by-step explanation:
Point X of triangle XYZ is located at (-5, -6). If triangle XYZ is translated 3 units
down and 1 units left, what are the new coordinates of X??
Answer:
(-6,-9)
Step-by-step explanation:
g^4+ 5h
when g=2 & h=4
Answer: 36
Step-by-step explanation:
g^4+5h
2^4+5(4)
16+20
36
Which of The Following Equations are true for the number 9 Select all the Apply
A. 4 ÷ [] = 9/4
B. 1/9 = [] ÷ 9
C. 7 ÷ [] = 7/9
D. [] ÷ 1/9 = 81
Ps. the [] are boxes/blank spots
Answer:
C and D
Step-by-step explanation:
C. 7 ÷ 9 = 7/9
D. 9 ÷ 1/9 = 9 x 9/1 = 81
If m varies directly as n and m = -4 when n = 32, find m when n = 3
Answer:
m=-0.375
Step-by-step explanation:
PRE-CALCULUS HELP
Hi can I please get some help on these two questions, I have to records the answer vocally and am not sure how to complete these last ones.
The point (2,5) is on the terminal side of 0. Explain how to find tan 0
Explain how to convert 42' 35'19' to decimal degrees.
20 POINTS! which values are solutions to x < 4
Answer:
A
Step-by-step explanation:
because 8 and 10 are greater than 4
Answer:
Step-by-step explanation:
x<4
Only answer C has two values which are less than 4