The z-score for a student who received a score of 90 on the entrance exam is 1.6.
What is the formula for calculating the area of a triangle?The z-score for a student who received a score of 90 on the entrance exam, with a mean of 82 and a standard deviation of 5, can be calculated as follows:
z = (x - μ) / σx is the student's score (90 in this case)μ is the mean (82)σ is the standard deviation (5)Plugging in the values:
z = (90 - 82) / 5Simplifying:
z = 8 / 5Calculating:
z = 1.6Therefore, the z-score for the student who received a score of 90 on the exam is 1.6.
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Write the equation of the line graphed at the right(please help I really need this)
the correct answer is X= -3
What is the Median for the Box & Whisker Plot below?
HELP PLEASEE
Answer:
20
Step-by-step explanation:
Combine the like terms to create an equivalent expression for 4z−(−3z)
Answer:
7z
Step-by-step explanation:
Answer: 7z
Step-by-step explanation:
two negatives cancel into a positive, so -(-3z) is +3z. 4z + 3z = 7z
PLEASE HELP HURRY WILL GIVE BRAINLIST IF CORRECT
Answer:
26 per week
Step-by-step explanation:
Based on the data shown below X 2 3 4 5 6 7 8 19 10 data 45.22 44.74 40.96 37.68 33.7 30.62 30.94 24.26 21.88 21.4 11 Find the correlation coefficient. What proportion of the variation in y can be explained by the variation in the values of x? Report answer as a percentage accurate to one decimal place.
There is a strong negative linear relationship between x and y, and almost all of the variation in y can be explained by the variation in x.
The correlation coefficient is -0.961 and the proportion of the variation in y that can be explained by the variation in the values of x is 92.3%.
The correlation coefficient measures the strength and direction of the linear relationship between two variables. In this case, the correlation coefficient between x and y is -0.961, which indicates a strong negative linear relationship between the two variables.
The coefficient of determination (r²) measures the proportion of the variation in y that can be explained by the variation in the values of x. In this case, the value of r² is 0.923, or 92.3%. This means that 92.3% of the variability in y can be explained by the variability in x. Therefore, there is a strong negative linear relationship between x and y, and almost all of the variation in y can be explained by the variation in x.
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All real solutions of the equation.
please help------------,
Answer:
600 cm²
Step-by-step explanation:
The shaded area (A) is calculated as
A = area of square - ( area of 3 unshaded triangles )
area of square = 40 × 40 = 1600 cm²
area of lower right triangle = [tex]\frac{1}{2}[/tex] × 20 × 40 = 10 × 40 = 400 cm²
area of upper left triangle = [tex]\frac{1}{2}[/tex] × 40 × 20 = 20 × 20 = 400 cm²
area of lower left triangle = [tex]\frac{1}{2}[/tex] × 20 × 20 = 10 × 20 = 200 cm²
Then
A = 1600 - (400 + 400 + 200 ) = 1600 - 1000 = 600 cm²
What is the best description of a food chain?
the competition among several species for the same food item
the transfer of energy from one organism to another
Answer:
the transfer of energy from one organism to another
Step-by-step explanation:
rebecca’s electric bill is a variable expense. what is the average amount she pays for electricity if she paid $135 in december, $129 in january, $99 in february, $120 in march and $140 in april?
The average amount Rebecca pays for electricity based on the given data is $124.60.
To calculate the average, we add up the amounts she paid in each month and then divide by the total number of months. In this case, the sum of her payments is $135 + $129 + $99 + $120 + $140 = $623. Dividing this sum by the total number of months (5), we get an average of $623 / 5 = $124.60. Calculating the average helps us determine the typical amount Rebecca pays for electricity based on the given data. It provides an overall picture of her average expenses in the specified period.
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The following data gives an approximation to the integral M = S'f(x) dx = 2.0282. Assume M = N,(h) + kyha + k_h* + ..., N,(h) = 2.2341, N, then N2(h) = 2.01333 1.95956 0.95957 2.23405
The value of N₂(h), for the following data gives an approximation to the integral M = [tex]\int\limits^1_0 {f(x)} \, dx[/tex] N₁(h)= 2.2341 N₁(h/2) = 2.0282 is 0.8754. So, none of the options are correct.
Given that N₁(h)= 2.2341 and N₁(h/2) = 2.0282.
Applying Richardson's extrapolation method, we can find the value of the definite integral M using the formula,
M = N₁(h) + k₂h² + k₄h⁴ + ...
Therefore, we have to find the value of N₂(h).
Here, h = 1 - 0 = 1.
N₂(h) can be obtained by the formula,
[tex]N_2(h) = \frac{(2^2 * N_1(h/2)) - N_1(h)}{2^2 - 1}[/tex] , Substituting the data values we get,
[tex]N_2(h) =\frac{(2^2 * 2.0282) - 2.2341}{2^2 - 1}[/tex]
[tex]N_2(h)= \frac{8.1128 - 2.2341}{3}[/tex]
[tex]N_2(h)=\frac{2.6263 }{3}[/tex]
[tex]N_2(h)=0.8754333 = 0.8754[/tex]
Therefore, none of the option is correct.
The question should be:
The following data gives an approximation to the integral M = [tex]\int\limits^1_0 {f(x)} \, dx[/tex] N₁(h)= 2.2341 N₁(h/2) = 2.0282. Assume M = N₁(h) + k₂h² + k₄h⁴ + ... then, N₂(h) =
a. 2.01333
b. 1.95956
c. 0.95957
d. 2.23405
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The measures of the angles of a triangle are shown in the figure below. Solve for x.
Answer: x = 10
Step-by-step explanation:
The sum of interior angles in a triangle is equal to 180°.
(2x + 3) + (5x + 17) + 90 = 180
2x + 3 + 5x + 17 + 90 = 180
7x + 110 = 180
7x = 70
x = 10
Hello um I need help if anyone could help me with this that would be perfect:))!!
Answer:
1. If D= whole numbers then the answer is B.0 if it is integers the answer is A.-10
2. The answer is D. That number is an irrational number.
Step-by-step explanation:
Im pretty sure that #1 is B.0, but since there are no labels and i haven't done this in a while, I wasn't quite sure. Sorry.
Find the distance between the two points rounding to the nearest tenth (if necessary). (-1,8) and (8,5)
Tell whether the angles are adjacent or vertical. Then find the value of X
Answer:
The angles are adjacent, and x=100
Step-by-step explanation:
The angles are adjacent because they share the same starting point. x=100 because x and the other angle are on a line, which has a measure of 180 degrees. We subtract 80 from 180 to get 100.
Hope this was helpful.
~cloud
let W be the subspace of spanned by the vectors [3 1 1] and [15 11 -1]
find the projection matrix that projects vectors in R3 onto W.
P=
The projection matrix P is [1/√11 -1/√337].
To find the projection matrix that projects vectors in ℝ³ onto the subspace W spanned by the vectors [3 1 1] and [15 11 -1], we can follow these steps:
Let's start by normalizing the basis vectors of W. Normalizing means dividing each vector by its magnitude to obtain unit vectors.
First basis vector:
u₁ = [3 1 1]
Normalize: v₁ = u₁ / ||u₁||
Compute the magnitude: ||u₁|| = √(3² + 1² + 1²) = √11
Normalize: v₁ = [3/√11, 1/√11, 1/√11]
Second basis vector:
u₂ = [15 11 -1]
Normalize: v₂ = u₂ / ||u₂||
Compute the magnitude: ||u₂|| = √(15² + 11² + (-1)²) = √337
Normalize: v₂ = [15/√337, 11/√337, -1/√337]
Next, we construct a matrix P using the normalized basis vectors as columns.
P = [v₁ v₂]
P = [3/√11 15/√337]
[1/√11 11/√337]
[1/√11 -1/√337]
Therefore, the projection matrix P that projects vectors in ℝ³ onto the subspace W spanned by the vectors [3 1 1] and [15 11 -1] is:
P = [3/√11 15/√337]
[1/√11 11/√337]
[1/√11 -1/√337]
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Suppose that the number of defects on a roll of magnetic recording tape has a Poisson distribution for which the mean A is either 1.0 or 1.5, and the prior probability mass function of A is as follows: (1.0) = 0.4 and (1.5) = 0.6. If a roll of tape selected at random is found to have four defects, what is the posterior probability mass function of X? The posterior p.m.f is____.
The posterior probability mass function of X is given below:0.4 * 0.0183 = 0.00732.0.6 * 0.0513 = 0.03078. Posterior Probability Mass Function of X: ____0.00732 if A = 1.0.____0.03078 if A = 1.5.
Explanation: The probability mass function for Poisson distribution is given by: P(X = x) = (e^-λ * λ^x) / x!Where,λ is the mean. The given prior probability mass function of A is P (A = 1.0) = 0.4P(A = 1.5) = 0.6.
Thus, the mean is either A = 1.0 or A = 1.5.
Now, let X be the number of defects on a roll of tape. Using the law of total probability, the probability mass function of X is P (X = x) = P (X = x, A = 1.0) + P (X = x, A = 1.5)
Using Bayes' theorem, the posterior probability mass function is given by: P (A = 1.0 | X = 4) = P (X = 4 | A = 1.0) * P (A = 1.0) / P (X = 4) P (A = 1.5 | X = 4) = P (X = 4 | A = 1.5) * P (A = 1.5) / P (X = 4)
Now, we need to calculate P (X = 4 | A = 1.0) and P (X = 4 | A = 1.5) using the Poisson distribution.
P (X = 4 | A = 1.0) = (e^-1 * 1^4) / 4! = 0.0183.P(X = 4 | A = 1.5) = (e^-1.5 * 1.5^4) / 4! = 0.0513.
Now, we need to calculate the value of the denominator,
P (X = 4). P (X = 4) = P (X = 4, A = 1.0) + P (X = 4, A = 1.5) = P (X = 4 | A = 1.0) * P (A = 1.0) + P (X = 4 | A = 1.5) * P (A = 1.5)
Put the values: P (X = 4) = (0.0183 * 0.4) + (0.0513 * 0.6) = 0.0342.
Put the values in the above posterior probability mass function equations,
we get: P (A = 1.0 | X = 4) = 0.00732 and P (A = 1.5 | X = 4) = 0.03078.
Therefore, the posterior probability mass function of X is:0.00732 if A = 1.0.0.03078 if A = 1.5.
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13. What is the quadratic function that has a graph that contains the points
{(-1,8), (0,5),(1,0))?
A g(x) = -x2 - 4x + 5
B g(x) = -x2 +5
C g(x) = -x2 + 7x + 5
D g(x) = -x2 + 4x + 5
Answer: D, i am a hight school teacher names miss smell my butt, and i know that i am right
MARK BRAINLIESTTTTTT
Answer:
i think its c hope it helps
Step-by-step explanation:
what are three ways you can solve a proportion?
Answer:
horizontal
vertical
diagonal
Step-by-step explanation:
I guess I only know those.hope it helps you
In this problem, y=c₁ece is a two-parameter family of solutions of the second-order DE y-y-0. Find a solution of the second-order TVP consisting of this differential equation and the given initial conditions. y(-1)=2 y(-1) = -2;
The solution of the second-order differential equation y'' - y' = 0 with the given initial conditions y(-1) = 2 and y'(-1) = -2 is y(x) = 2e^x - 4e^-x.
To find a solution to the second-order differential equation y'' - y' = 0, we first solve the characteristic equation by assuming a solution of the form y(x) = e^(rx). Plugging this into the differential equation, we get r^2e^(rx) - re^(rx) = 0. Factoring out e^(rx), we have e^(rx)(r^2 - r) = 0. This gives us two possible values for r: r = 0 and r = 1.
For r = 0, the corresponding solution is y₁(x) = c₁, where c₁ is a constant.
For r = 1, the corresponding solution is y₂(x) = c₂e^x, where c₂ is a constant.
To find the particular solution that satisfies the given initial conditions, we substitute the values of x = -1, y(-1) = 2, and y'(-1) = -2 into the general solution. This gives us the equations 2 = c₁ and -2 = c₂e^-1. Solving for c₁ and c₂, we find c₁ = 2 and c₂ = -2e.
Therefore, the solution to the second-order differential equation with the given initial conditions is y(x) = 2e^x - 4e^-x.
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Find the distance between the two points.
(-4, 7), (4,0)
units.
The distance between the two points is
Answer: √113 or 10.63
Step-by-step explanation: the exact answer is √113, or 10.63 if you're looking for the decimal form
Step-by-step explanation:
Let the distance between two points A = (-4,7) and B = (4,0).
Here, x1 = -4 , y1 = 7
x2 = 4 , y2 = 0
Use the distance formula to find out the distance between two points are:
AB = √[(x2-x1)²+(y2-y1)²]
= √[{4-(-4)}²+(0-7)²]
= √[(4+4)²+(-7)²]
= √[(8)² + (-7)²]
= √[(8*8)+(-7*-7)]
= √[64+49]
= √[113] ⇛10.630 units approximately.
what is the midline equation of y= 7sin (3pi/4 x - pi/4) +6
Answer: 6
Step-by-step explanation:
Answer: y=6
Step-by-step explanation:
Find the volume of an oblique circular cylinder that has a radius of five feet and a height
of three feet
Answer:
235.5 cubic feet
Step-by-step explanation:
The volume v of a circular cylinder whose base radius is r and height h is given as
v = πr^2h
where π is 22/7 or 3.14
Given that the radius is five feet and the height is three feet
the volume v = 3.14 *5^2 * 3
= 235.5 cubic feet
The volume of the oblique circular cylinder is 235.5 cubic feet
In the diagram linem is parallel to linen
with a transversal linet.
Which of the below terms best describe
the relationship between <3 and <4?
Answer:
Alternate exterior angles
Step-by-step explanation:
If they shared a vertex, they would be vertical angles, but since they are on different lines, and alternate sides, the dark blue (alternate exterior angles) answer is correct.
Pls help and thank youuuuu:)
Answer:
22
Step-by-step explanation:
according to your question
A custom fish tank shaped like a rectangular prism needs to have a length of 21 inches, a width of 16 inches and hold a volume of 6758 cubic inches. What height must the tank be made to meet these specifications?
Answer:
i dont know im not that smart ask someone else dude
Step-by-step explanation:
Calculate each value for ⊙P. Use 3.14 for π and round to the nearest tenth.
please help!! will mark brainliest!!
Answer:
226.19 inches
Step-by-step explanation:
Find the total surface area of this cone. Leave your answer in terms of pie.
Answer:
90[tex]\pi[/tex]
Step-by-step explanation:
if you want explanation say in comments
Find the perimeter of the window to the nearest hundredth.
perimeter: about
ft
For the following argument, construct a proof of the conclusion from the given premises, -(3x) (PX Mx), (3x) (Mx Sx) 1:. -(x) (SxPx)
To construct a proof of the conclusion "-(∀x) (S(x) ∧ P(x))" from the given premises "-(3x) (P(x) ∧ M(x))" and "(3x) (M(x) ∧ S(x))," we can use a proof by contradiction.
We will assume the negation of the conclusion and derive a contradiction. Here's the proof:
-(∀x) (S(x) ∧ P(x)) (Assumption)Therefore, we have derived a contradiction, which allows us to conclude that the negation of the assumption is false. Thus, we can conclude:
-(∀x) (S(x) ∧ P(x))
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