Suppose we had the following summary statistics from two different, independent, approximately normally distributed populations, both with variances equal to σ:

1. Population 1: ¯x1=130, s1=25.169, n1=5

2. Population 2: ¯x2=154.75, s2=14.315, n2=4

Calculate a 94% confidence interval for μ2−μ1.

__?__ < μ2−μ1 < __?__

The given statement " If A and B are n x n and invertible, then A⁻¹B⁻¹ is the inverse of AB." is true because  A and B are invertible matrices, it means that they both have an inverse (A⁻¹and B⁻¹, respectively). The product of A and B, represented by AB, is also an n x n matrix.

To show that A⁻¹B⁻¹is the inverse of AB, we must demonstrate that the product of (AB) and (A⁻¹B⁻¹) results in the identity matrix, which is an n x n matrix with 1s along the diagonal and 0s elsewhere.
To verify this, we'll multiply (AB) with (A⁻¹B⁻¹) and check if the result is the identity matrix:
(AB)(A⁻¹B⁻¹) = A(BA⁻¹)B⁻¹ (associative property of matrix multiplication)
Since B and A^-1 are inverses of each other, their product equals the identity matrix:

A(BA⁻¹)B⁻¹= AI B⁻¹(where I is the identity matrix)
Multiplying A and I doesn't change A:
AI B⁻¹= A B⁻¹
Now, A and B⁻¹are inverses of each other as well, so their product also equals the identity matrix:
A B⁻¹= I
Thus, A⁻¹B⁻¹ is indeed the inverse of AB, as the product of (AB) and (A⁻¹B⁻¹) results in the identity matrix.

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Answer:

Step-by-step explanation:

11.

Area as sum: \(7d+7*4\)

Area as Product: 7(d+4)

12. Area as sum: y*y+y*3

Area as Product: y(y+3)

Answer:

LCM=780

Step-by-step explanation:

The least common denominator, also called lowest common denominator (LCD), of 60 and 13 is 780. Here is a math problem example where you need to know the LCD of 60 and 13 to solve: 3/60 + 2/13 = 780

The correct statement regarding the annual interest rate for the given equations is (A) For A = P(1.025), the principal amount of money is increasing at a 2.5% interest rate.

What is an equation?

An equation is a mathematical statement that shows that two expressions are equal. It consists of two sides separated by an equals sign (=).

In the equation A = P(1 + r)t, the annual interest rate is represented by the variable "r". It is not correct to directly interpret the value of (1 + r) as the interest rate, as it represents the factor by which the principal amount is multiplied over time to yield the total amount.

Let's analyze each given equation to see which statement correctly relates information regarding the annual interest rate:

(A) For A = P(1.025), the equation does not have a term for time (t), so it cannot represent the growth of a principal amount over time. It simply represents the total amount (A) as 102.5% of the principal amount (P), which means that the interest rate is 2.5% per year.

(B) For A = P(1.0052), similar to the previous equation, this equation does not have a term for time (t), so it cannot represent the growth of a principal amount over time. It simply represents the total amount (A) as 100.52% of the principal amount (P), which means that the interest rate is 0.52% per year.

(C) For A = P(0.86)t, the value of (0.86) represents the factor by which the principal amount is multiplied over time to yield the total amount. Since (0.86) is less than 1, it means that the principal amount is decreasing over time, not increasing. The interest rate in this case is -14% per year (negative because the principal amount is decreasing).

(D) For A = P(0.68)t, similar to the previous equation, the value of (0.68) represents the factor by which the principal amount is multiplied over time to yield the total amount. Since (0.68) is less than 1, it means that the principal amount is decreasing over time, not increasing. The interest rate in this case is -32% per year (negative because the principal amount is decreasing).

Therefore, the correct statement regarding the annual interest rate for the given equations is:

(A) For A = P(1.025), the principal amount of money is increasing at a 2.5% interest rate.

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Given:

A sphere is given

Radius=D/2=17 m

Required:

To calculate the surface are and volume of the sphere

Explanation:

Firstly we calculate surface area of sphere

Answer:

1/2

Step-by-step explanation:

y2 - y1 / x2 - x1

-17 - (-8) / -5 - 13

-9 / - 18

= 1/2

The three angle bisector of a triangle intersect at a single point that point of concurrency of the angle of bisectors is called the incenter.

Given:

the 3 angle bisectors of a triangle intersect.

when three angle bisector of a triangle intersect then that point of concurrency is called incenter.

Incenter:

The incenter of a triangle is the intersection point of all the three interior angle bisectors of the triangle. In other words, it can be defined as the point where the internal angle bisectors of the triangle cross. This point will be equidistant from the sides of a triangle, as the central axis’s junction point is the center point of the triangle’s inscribed circle.

Incenter formula:

= (ax1+bx2+x3 / a+b+c  , ay1+by2+y3 / a+b+c).

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Answer: 2^n-1

Step-by-step explanation: You did not provide a full answer but I hope this is correct for you.

Answer:

2−1

Step-by-step explanation:

Answer:N= 10 fo sho m -14 maybe

Step-by-step explanation:

this triangle is an isosceles triangle because of the 90 45 45 angles. This means that the two side lengths are equal and 10 is equal to n. to calculate m is maybe square root of 2 times 10 because this image.

Maria skied a distance of 2.55 km, taking 0.425 hours (25.5 minutes) going up and 0.075 hours (4.5 minutes) skiing down.

To find out how far Maria skied and for how long, we'll use the given information and apply the distance-rate-time formula. The formula is Distance = Rate × Time.
First, let's convert the given 30 minutes into hours since the rates are in km/hr.
30 minutes = 30/60 = 0.5 hours.
Let x be the distance Maria skied up and down, and let t1 and t2 be the time taken to go up and down, respectively.
For the ski lift(going up):
Distance = Rate × Time
x = 6 × t1
For skiing down:
Distance = Rate × Time
x = 34 × t2
Since the round trip took 0.5 hours, we have:
t1 + t2 = 0.5
Now we have a system of equations:
x = 6 × t1
x = 34 × t2
t1 + t2 = 0.5
From the first equation, we can express t1 as:
t1 = x/6
From the second equation, we can express t2 as:
t2 = x/34
Now substitute these expressions into the third equation:
(x/6) + (x/34) = 0.5
To solve for x, find a common denominator (in this case, 102) and combine the fractions:
(17x + 3x) / 102 = 0.5
20x = 51
x = 51/20
x = 2.55 km
Now, we can find t1 and t2:
t1 = x/6 = 2.55/6 = 0.425 hours
t2 = x/34 = 2.55/34 = 0.075 hours
So, Maria skied a distance of 2.55 km, taking 0.425 hours (25.5 minutes) going up and 0.075 hours (4.5 minutes) skiing down.

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Answer:

1. triange  2. trangle prism

Step-by-step explanation:

Answer:

y=5/2x-5

Step-by-step explanation:

The line is interested to the graph is (2,-5)

Answer:

x

Step-by-step explanation:

\(\sqrt{\frac{2x^2 +4x +2}{2} } -1\\\\= \sqrt{x^2 + 2x + 1} -1\\ \\=\sqrt{x^2 + x+x+1} -1\\\\=\sqrt{x(x+1)+(x+1)} -1\\\\=\sqrt{(x+1)(x+1)} -1\\\\=\sqrt{(x+1)^2} -1\\\\=x+1 - 1\\\\= x\)

Answer:

hol up

x=-1/8  negative one over eight

Step-by-step explanation:

Answer: 6.85%

Step-by-step explanation:

To understand the question, let us draw the graphs of each one

The red graph represents A

The blue graph represents B

The green graph represents C

The purple graph represents D

Let us find the narrowest

The blue graph is the narrowest because it is closed to the y-axis more than the other graphs

The correct answer is B

The mean amount of snow per day is equal to 19 cm snow per day.

In Mathematics and Geometry, the mean for this set of data can be calculated by using the following formula:

Mean = [F(x)]/n

For the total amount of snow based on the frequency, we have;

Total amount of snow (s cm), F(x) = 5(8) + 15(10) + 25(7) + 35(2) + 45(3)

Total amount of snow (s cm), F(x) = 40 + 150 + 175 + 70 + 135

Total amount of snow (s cm), F(x) = 570

Now, we can calculate the mean amount of snow as follows;

Mean = 570/30

Mean = 19 cm snow per day.

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Missing information:

The question is incomplete and the complete question is shown in the attached picture.

Answer: 5%

Step-by-step explanation:

Answer:yes but that to is gonna get the same answer F(x) =1/2x+1/2

f-1(x) = [ ? ]x + [ ]

Step-by-step explanation:

Answer:

456,8

Step-by-step explanation:

325 / 185 / 10 * 8 * 325

Remember that

The rule of a reflection over the line y=-x is equal to

(x,y) ------> (

Regular hexagon ABCDEF is inscribed in a circle with center H, the image of segment BC after 120 degree clockwise rotation about point H is the segment joining the points B' and C', which has endpoints (-0.5r\(\sqrt{3\), -0.5r) and (-0.5r, -0.5r).

Since the hexagon is inscribed in a circle with center H, we can conclude that H is also the center of the circle passing through vertices B, C, and D. Therefore, the circle passing through B, C, and D is also a 120 degree clockwise rotation of the circle passing through A, B, and C.

To find the image of segment BC after a 120 degree clockwise rotation about point H, we need to find the coordinates of B and C relative to H, and then apply a 120 degree rotation matrix to these coordinates.

Let the radius of the circle be r, and let the coordinates of H be (0,0). Then the coordinates of B and C are:

B: (r cos(60), r sin(60))

C: (r cos(0), r sin(0)) = (r, 0)

To apply a 120 degree clockwise rotation matrix, we can use the following matrix:

[ cos(-120) -sin(-120) ]

[ sin(-120) cos(-120) ]

Simplifying, we get:

[ cos(120) sin(120) ]

[ -sin(120) cos(120) ]

Applying this matrix to the coordinates of B and C, we get:

B': [ cos(120) sin(120) ][ r cos(60) ] = [ -0.5r \(\sqrt{3}\)]

[ -sin(120) cos(120) ][ r sin(60) ] [ -0.5r ]

C': [ cos(120) sin(120) ][ r ] = [ -0.5r ]

[ -sin(120) cos(120) ][ 0 ] [ -0.5r ]

Therefore, the image of segment BC after a 120 degree clockwise rotation about point H is the segment joining points B' and C', which has endpoints (-0.5r\(\sqrt{3}\), -0.5r) and (-0.5r, -0.5r), respectively.

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Answer:

9 1/3

Step-by-step explanation:

That is wrong i tried to answer it but messed up so don't use it

Answer:

71+50+6x-1=180

121+6x-1=180

121-1+6x=180

120+6x=180

6x=180-120

6x=60

x=60/6

x=10

so the value of x is 10

Answer: 1st 173 2nd 396

Step-by-step explanation: I hope this helps!

Answer:

A single number that estimates the value of an unknown parameter is called a point estimate.

Step-by-step explanation:

Don't see the point (haha) of elaborating

The process of counting the number of observations is knowns as Tabulation.

The logical representation of the numerical data written in rows and columns is known as tabulation. It helps in to facilitate the statistical analysis. The data that can be organized in the form of table is termed as tabulation. The data in the table can be represented in a systematic manner. The main objective of tabulation is to present the systematic data in a brief manner.

There are two types of tabulation. They are:

1.Simple tabulation

2.Complex tabulation

A simple example for the tabulation is, The population of the people is divided into religion, caste, gender, age etc.

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Answer:

a = 17 sqrt(2)

Step-by-step explanation:

Since this is a right triangle, we can use trig functions

sin theta = opposite / hypotenuse

sin 45 = 17/a

Multiply each side by a

a sin 45 = 17

Divide each side by sin 45

a = 17 / sin 45

a = 17 / ( 1 / sqrt(2))

a = 17 sqrt(2)

To determine the probability that a man and woman getting married both have at least a bachelor's degree, we need to make certain assumptions.

Firstly, we must assume that the probability of a man having at least a bachelor's degree is independent of the probability of a woman having at least a bachelor's degree. Additionally, we must assume that the population of men and women with at least a bachelor's degree is representative of the population of all married couples.
Assuming these conditions are met, we can estimate the probability of a man having at least a bachelor's degree as well as the probability of a woman having at least a bachelor's degree using data from the relevant population. We can then calculate the joint probability of both events occurring simultaneously by multiplying the probabilities of each event. Without data, it is difficult to provide an exact probability. However, according to the U.S. Census Bureau, as of 2019, approximately 35% of the U.S. population aged 25 and older have at least a bachelor's degree. Therefore, assuming that the probabilities are independent, the probability of a man having at least a bachelor's degree is approximately 0.35, and the probability of a woman having at least a bachelor's degree is also approximately 0.35.
Multiplying these probabilities together, we get an estimated probability of 0.1225 or 12.25% chance that a man and woman getting married both have at least a bachelor's degree. However, it's important to remember that this is only an estimate and may not hold true for all populations or regions.

To determine the probability that a man and a woman getting married both have at least a bachelor's degree, we need to make some assumptions and use the concept of probability.
Assumptions:
1. The probability of a man having a bachelor's degree is independent of the probability of a woman having a bachelor's degree.
2. We know the probabilities of a man and a woman having a bachelor's degree in the given population.
Let P(M) be the probability of a man having a bachelor's degree, and P(W) be the probability of a woman having a bachelor's degree. To find the probability of both the man and the woman having a bachelor's degree, we simply multiply these two probabilities:
P(both have bachelor's degree) = P(M) * P(W)
So, the probability that a man and a woman getting married both have at least a bachelor's degree depends on the individual probabilities of a man and a woman having a bachelor's degree in the population under consideration.

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Answer:

2(y+10)

Step-by-step explanation:

factor out the common term 2

Answer:

2(y + 10)

Step-by-step explanation:

cannot find y unless this is supposed to equal something, but this is how you factor out the answer. let me know if you have any other questions!

The answer is "141.17647058823529411764705882353", hope this helps! Please Mark me the brainliest! ☺

Answer:

$7

Step-by-step explanation: