Answer:
r = 0.9
Step-by-step explanation:
Correlation is denoted by r. r² is usually used to measure variation along the line as a fraction of the total variation.
We are told class attendance explained 81% of the variation in grade index among the students. Thus, for this regression, the variation is;
r² = 81%
Or r² = 0.81
Thus, the numerical value of the correlation r would be;
r = √0.81
r = 0.9
Write the equation of a line through (1,2), parallel to y=4x+1
Answer:
Step-by-step explanation:
y - 2 = 4(x - 1)
y - 2 = 4x - 4
y = 4x - 2
RS = 7y - 4
ST = y +5
RT = 28
The values of RS = 19.625 and ST is 8.375.
What is segment Addition Postulate?The segment addition postulate states that if we are given two points on a line segment, A and C, a third point B lies on the line segment AC if and only if the distances between the points meet the requirements of the equation AB + BC = AC.
Given:
RS= 7y-4, ST= y+5, and RT= 28
Suppose that S is between R and T, then:
RS + ST = RT
Putting the values
7y-4+y+5 = 28
7y+y-4+5 = 28
8y + 1 = 28
Subtract 1 from both sides
8y+1-1 = 28 - 1
8y = 27
y = 27/8
y = 3.375
So, length of RS = 7y - 4 = 23.625 - 4 = 19.625.
and, ST = y+5
ST = 3.375+5
ST = 8.375
Hence, the value of RS = 19.625 and ST is 8.375.
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will give away lots of points! 25 total!!!!
Answer:
maybe the answer is or "ABC" or "BCA" hope i halp :)
Answer:
mmk
Step-by-step explanation:
Which of the following reltions is not a function?
a
{(- 1, 4), (1, 6), (4, 10)}
b
{(- 1, 2), (1, 3), (- 1, 4)}
c
{(- 1, 6), (4, 7), (5, 6)}
d
{(- 1, 2), (1, 2), (3, 3)}
Answer:
B is the correct answer
Step-by-step explanation:
There are two y coordinates for one x coordinate
Evaluate the function Find f(x)= 3x^2-x+2 a. x=3 b. x=-5 c. f(2) d. f(m) e. f(x+2)
Answer:
see explanation
Step-by-step explanation:
Given
f(x) = 3x² - x + 2
To evaluate given values of x, substitute the values of x into f(x)
(a)
f(3) = 3(3)² - 3 + 2 = 3(9) - 1 = 27 - 1 = 26
(b)
f(- 5) = 3(- 5)² - (- 5) + 2 = 3(25) + 5 + 2 = 75 + 5 + 2 = 82
(c)
f(2) = 3(2)² - 2 + 2 = 3(4) = 12
(d)
f(m) = 3m² - m + 2
(d)
f(x + 2) = 3(x + 2)² - (x + 2) + 2 ← expand (x + 2)² using FOIL
= 3(x² + 4x + 4) - x - 2 + 2
= 3x² + 12x + 12 - x ← collect like terms
= 3x² + 11x + 12
Find the shortest distance, d, from the point (5, 0, −6) to the plane x + y + z = 6.
Answer:
[tex]\frac{7}{\sqrt{3}}[/tex]
Step-by-step explanation:
The shortest distance d, of a point (a, b, c) from a plane mx + ny + tz = r is given by:
[tex]d = |\frac{(ma + nb + tc - r)}{\sqrt{m^2 + n^2 + t^2}} |[/tex] --------------------(i)
From the question,
the point is (5, 0, -6)
the plane is x + y + z = 6
Therefore,
a = 5
b = 0
c = -6
m = 1
n = 1
t = 1
r = 6
Substitute these values into equation (i) as follows;
[tex]d = |\frac{((1*5) + (1*0) + (1 * (-6)) - 6)}{\sqrt{1^2 + 1^2 + 1^2}} |[/tex]
[tex]d = |\frac{((5) + (0) + (-6) - 6)}{\sqrt{1 + 1 + 1}} |[/tex]
[tex]d = |\frac{(-7)}{\sqrt{3}} |[/tex]
[tex]d = \frac{7}{\sqrt{3}}[/tex]
Therefore, the shortest distance from the point to the plane is [tex]d = \frac{7}{\sqrt{3}}[/tex]
find the distance between (-8, -2)
and 6, -1)
Answer:
-8,-2= 6
6,-1=7
Step-by-step explanation:
get a number line and use that to it and look up how to use a number line with negative numbers it’s not hard once you see how it’s done
Hey there! I'm happy to help!
Here is how to find the distance between two points.
Find the difference between the x values.
-8-6=-14
We square this.
14²=196
We find the difference between the y values.
-2-(-1)=-2+1=-1
We square it.
-1²=1
We add up the two numbers we got.
196+1=197
And we square root it.
√197≈14
Have a wonderful day! :D
-9+8 *
8+(-1) *
-6+(-2) *
1. -1
2. 7
3.-8
i hope these are the answers
Answer:
-1,7, - 8
Step-by-step explanation:
-9 +8 =-1
8 +(-1)=7
-6 +(-2)=-8
A secret government agency has developed a scanner which determines whether a person is a terrorist. The scanner is fairly reliable; 95% of all scanned terrorists are identified as terrorists, and 95% of all upstanding citizens are identified as such. An informant tells the agency that exactly one passenger of 100 aboard an aeroplane in which you are seated is a terrorist. The police haul off the plane the first person for which the scanner tests positive. What is the probability that this person is a terrorist
Answer:
The probability of a person is a terrorist is [tex]0.161.[/tex]
Step-by-step explanation:
Let,
[tex]A=[/tex] Your neighbor is a terrorist
[tex]B=[/tex] Your neighbor tested positive
Now we want to find the value of [tex]P(A|B)[/tex] where
[tex]P(A|B)=\frac{P(B|A)P(A)}{P(B|A)P(A)+P(B|A^c)P(A^c)}[/tex]
where [tex]P(A)=\frac 1{100}=1-P(A^c), P(B|A)=0.95,[/tex]
[tex]P(B|A^c)=1-0.95=0.05[/tex]
Therefore, [tex]P(A|B)=\frac{\frac{0.95}{100}}{\frac{0.95}{100}+0.05\times \frac{99}{100}}[/tex]
[tex]=\frac{\frac{0.95}{100}}{\frac{0.95+0.05\times 99}{100}}=\frac{0.95}{0.95+4.95}[/tex]
[tex]=0.161[/tex]
Hence, the probability of a person is a terrorist is [tex]0.161.[/tex]
What is wrong with the equation? π 4 sec(θ) tan(θ) dθ = 4 sec(θ) π π/3 = −12 π/3 There is nothing wrong with the equation. f(θ) = 4 sec(θ) tan(θ) is not continuous on the interval [π/3, π] so FTC2 cannot be applied. f(θ) = 4 tan(θ) is not continuous on the interval [π/3, π] so FTC2 cannot be applied. f(θ) = 4 sec(θ) is not continuous at θ = π/3 so FTC2 cannot be applied. The lower limit is not equal to 0, so FTC2 cannot be applied.
The given equation is not defined in the interval [tex]\left[\dfrac{\pi}{3},\pi\right][/tex]. Therefore, FTC2 is not applied and this can be determined by using the property of the trigonometric function.
Given :
Equation -- [tex]\rm \int^{\pi}_{\pi/3}7\;sec\theta\; tan\theta \;d\theta[/tex]
The following steps can be used in order to determine what is wrong with the given equation:
Step 1 - Write the given equation.
[tex]\rm \int^{\pi}_{\pi/3}7\;sec\theta\; tan\theta \;d\theta[/tex]
Step 2 - In the given equation [tex]\rm sec\theta[/tex] is not defined at [tex]\theta = \pi/2[/tex].
Step 3 - In the given equation [tex]\rm tan\theta[/tex] is not defined at [tex]\theta = \pi/2[/tex].
Step 4 - From the above steps, it can be concluded that the given equation is not defined in the interval [tex]\left[\dfrac{\pi}{3},\pi\right][/tex]. Therefore, FTC2 is not applied.
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What is the solution to the following equation? (4 points) 5(2x − 6) + 20 = 10 Group of answer choices
Answer:
x=2
Step-by-step explanation:
Consider a medical study that is being performed to test the effect of smoking on lung cancer. Two groups of subjects are identified; one group has lung cancer and the other one doesn't. Both are asked to fill out a questionnaire containing questions about their age, gender and occupation. What is the response variable
Answer:
Lung cancer
Step-by-step explanation:
The response variable is lung cancer. From the question we are testing to find out what effect smoking has on lung cancer. Therefore lung cancer is our response variable.
Another name for the response variable is the dependent variable. And it is the variable that we are testing for. This variable would respond to changes that are being made to the independent variable.
Jan completes 60 trials of pulling colored marbles out of a bag. She pulled green 15 times. If there are 250 marbles in the bag, how many of them are probably green?
Answer:
the answer is 63 green marbles
Step-by-step explanation:
Answer:
Green marbles are probably = 62.5.
Step-by-step explanation:
Since Jan completes 60 trials and pulled green 15 times, the probability of any marble being green can be calculated as:
= 15/60
= 0.25
With 250 marbles in the bag, using the probability value of green marbles calculated above, the number of green marbles can be estimated as:
= 0.25 of 250
= 62.5
This shows that since there is a 25% probability of obtaining a green marble from 60 trials of pulling colored marbles out of the bag containing 250 marbles, then the total number of green marbles will be equal to 62 or 63.
A doctor give his patient liquid medicine and told him to drink 99 cups over the next 10 days. How much should the patient drink each day
Answer:
If he had to take it evenly, he'd take 9.9 cups a day.
Step-by-step explanation:
I found this by dividing 99 cups over 10 days. 99/10
divide 738 in the ratio
Answer:
could you say the whole question?
Step-by-step explanation:
thanks alot
I need a little more help
The salt water fish tank at your house is filled with 22 inches of water. The water evaporates at a steady rate of 2 inches per week. Write an equation that approximates the depth y of water in the aquarium x weeks after you fill it.
Answer:
y = 22 - 2x
Step-by-step explanation:
Given the following :
Amount of water in salt water fish tank = 22 inches
Evaporation occurs steadily at the rate ; 2 inches per week
The depth y of water in the aquarium x weeks after filling :
The depth of water reduces as evaporation occurs ; and as such reduces by 2 inches per week
Hence,
After x weeks, the depth 'y' of water in the aquarium will be :
y = Initial position of water - 2(number of weeks)
y = 22 - 2x
y = new depth
x = number of weeks
20. Solve for r
T=1+r/n
Answer:
r = nT-n
Step-by-step explanation:
T = 1 + r/nT-1 = r/nn(T-1) = rnT-n = rStep-by-step explanation:
T = 1 + r/n
T-1 = r/n
n(T-1) = r
nT-n = r
Answer:
r = nT-n
12-(-5) subtract using a number line
Answer:17
Step-by-step explanation:
Given: Lines a and b are parallel and line c is a transversal.
Prove: ∠2 is supplementary to ∠8
What is the missing reason in the proof?
Statement Reason
1. a || b, is a transv 1. given
2. ∠6 ≅ ∠2 2. ?
3. m∠6 = m∠2 3. def. of congruent
4. ∠6 is supp. to ∠8 4. def. of linear pair
5. ∠2 is supp. to ∠8 5. congruent supplements theorem
A: vertical angles theorem
B: alternate interior angles theorem
C: corresponding angles theorem
D: alternate exterior angles theorem
Answer:
C: corresponding angles theoremStep-by-step explanation:
The angles in matching corners are called Corresponding Angles.
The Corresponding Angles Theorem: If a transversal cuts two parallel lines, their corresponding angles are congruent
∠6 ≅ ∠2 as per above statementCorrect answer choice is C.
The missing reason is corresponding angles theorem.
What are corresponding angles?Corresponding angles are angles that have the same relative position or measurement in two similar figures. They are formed when two lines, parallel or not, are intersected by a transversal.
Given that, lines a and b are parallel and line c is a transversal.
We need to prove ∠2 is supplementary to ∠8.
The proof:-
1. a || b, c is a transv. 1. given
2. ∠6 ≅ ∠2 2. corresponding angles theorem
3. m∠6 = m∠2 3. def. of congruent
4. ∠6 is supp. to ∠8 4. def. of linear pair
5. ∠2 is supp. to ∠8 5. congruent supplements theorem
Hence the missing reason is corresponding angles theorem.
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From long experience, it is known that the time it takes to do an oil change and lubrication job on a vehicle has a normal distribution with a mean of 17.8 minutes and a standard deviation of 5.2 minutes. An auto service shop will give a free lube and oil change service to any customer who must wait beyond the guaranteed time to complete the work. If the shop does not want to give more than 1% of its customers a free lube and oil change service, how long should the guarantee be
Answer: 29.916 minutes
Step-by-step explanation:
Given the following :
Mean of distribution = 17.8 minutes
Standard deviation of distribution = 5.2 minutes
Percentage of customers to give free lube and oil change service should not exceed 1% if the customer waits beyond the guaranteed time ;
Length of guarantee :
Since % of customers should not exceed 1%
Then probability of not being chosen = (1 - 0.01) = 0.99
Using the z table to find the Zscore of 0.99,
Zscore of 0.99 = 2.33
This is 2.33 standard deviations above the mean
(2.33 × standard deviation) + mean value
(2.33 × 5.2 minutes) + 17.8 minutes
12.116 + 17.8
= 29.916 minutes
Need help on this question
In December, the amount of snowfall was 3 2/3 feet. In January, the amount of snowfall was 4 1/8 feet. What was the amount of snowfall in the two months combined? Write your answer as a mixed number in simplest form.
Answer:
7 19/24
Step-by-step explanation:
Add. That is your answer.
Evaluate
38 – (7 + 2 x 4) + 1
Answer:
24
Step-by-step explanation:
Hope that's right
Answer:
24
Step-by-step explanation:
First Pemdas first everything inside the parenthesis then times it by negative then add everything up
Which of the following is a solution to the equation −25x = 10?
x = -4
x = -4
x = -25
x = -25
x = 4
x = 4
x = 25
Answer: x=-0.4
Step-by-step explanation:
Gabriel determined that his total cost would be represented by 2.5x + 2y – 2. His sister states that the expression should be x + x + 0.5x + y + y – 2. Who is correct? Explain
Answer:
Both Gabriel and his sister are correct. The two expressions are equivalent. Gabriel’s sister just needs to combine her like terms to get the same expression as Gabriel.
Step-by-step explanation:
sample response for ed 20202
Question 2 (2 points)
Subtract.
A) -18 - (-12) =
on &
5
Answer:
-6
(I don’t understand what you mean by on & 5 but..)
Step-by-step explanation:
The two negatives (the -(- ) cancel each other out and make a postive, so
-18 + 12 = -6
Answer:
-6
Step-by-step explanation:
-18 - (-12)=-18+12
-18+12=-6
1) What should h be so that the expression h? - 2h has a value of 3 ?
Th = 1
Oh=-1
h = 2
h = -2
Write the equation of a line that passes through (2,-1) and is PARALLEL to y = -3x + 4
The equation is ______
Answer:
y = -3x + 5
Step-by-step explanation:
Since the line is parallel, we know that the slope of our line must be equal to the one given.
The given equation is:
y = -3x + 4
and thus, it has a slope of -3
As such, our unknown equation...
y = kx + m
...must have the same k-value, or the same slope, of -3.
y = -3x + m
Now we just need to find m. We know that our line passes through the point (2, -1), or in other words, when x = 2, y = -1
We can put these values for x and y into our equation.
y = -3x + m
-1 = -3 * 2 + m
-1 = -6 + m
Adding 6 to both sides:
5 = m
m = 5
Putting m = 5 into our equation:
y = -3x + m
y = -3x + 5
..we find that our equation is
y = -3x + 5
The required equation of a line is y = -3x + 5 that passes through (2,-1) and is parallel to y = -3x + 4.
What is the slope of the line?The slope of the line is defined as the gradient of the line.
The given equation is:
y = -3x + 4
And, it has a slope of -3
We know that the slope of our line must be equal to the one given because the line is parallel.
y = mx + c
Here the same slope, of -3, so m = -3
y = -3x + c ....(i)
The required line passes through point (2, -1),
Substitute the values of x = 2, and y = -1 in equation (i), and solve for c
y = -3x + c
-1 = -3(2) + c
-1 = -6 + c
Add 6 to both sides of the equation,
5 = c
c = 5
Substitute the values of c = 5 = 2 in equation (i),
y = -3x + 5
Thus, the required equation of a line is y = -3x + 5 that passes through (2,-1) and is parallel to y = -3x + 4.
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Can someone Help me with this Question.
Answer:
D.
Step-by-step explanation:
