Find AB. Do not use the matrix function in a calculator - do this by hand and show all work.

Find AB. Do Not Use The Matrix Function In A Calculator - Do This By Hand And Show All Work.

Answers

Answer 1

Solution:

Given that matrices A, B, C as follows:

\(\begin{gathered} A=\begin{bmatrix}{3} & {4} & {} \\ {-5} & {2} & {} \\ {1} & {0} & {}\end{bmatrix} \\ B=\begin{bmatrix}{-4} & {2} \\ {3} & {7}\end{bmatrix} \\ C=\begin{bmatrix}{6} & {-1} & {} \\ {2} & {0} & {} \\ {-3} & {5} & {}\end{bmatrix} \end{gathered}\)

To find AB, we multiply the elements of each row of matrix A by the elements of each column matrix B, and sum the products as follows:

\(\begin{gathered} AB=\begin{bmatrix}{3} & {4} & {} \\ {-5} & {2} & {} \\ {1} & {0} & {}\end{bmatrix}\begin{bmatrix}{-4} & {2} \\ {3} & {7}\end{bmatrix} \\ =\begin{bmatrix}{(3\times-4)+(4\times3)} & {(3\times2)+(4\times7)} & {} \\ {(-5\times-4)+(2\times3)} & {(-5\times2)+(2\times7)} & {} \\ {(1\times-4)+(0\times-3)} & {(1\times2)+(0\times7)} & {}\end{bmatrix} \\ =\begin{bmatrix}{-12+12} & {6+28} & {} \\ {20+6} & {-10+14} & {} \\ {-4+0} & {2+0} & {}\end{bmatrix} \\ =\begin{bmatrix}{0} & {34} & {} \\ {26} & {4} & {} \\ {-4} & {2} & {}\end{bmatrix} \end{gathered}\)

Hence, the product AB is

\(\begin{bmatrix}{0} & {34} & {} \\ {26} & {4} & {} \\ {-4} & {2} & {}\end{bmatrix}\)


Related Questions

What is the solution to the equation? 3|x| − 1 = 8


x = 3 or 9


x = −9 or 9


x = −3 or 3


x = −3 or −9

please help

Answers

Answer:

x = 3

Step-by-step explanation:

3|x|- 1= 8

=3x = 8 + 1

=3x = 9

=3x/3 = 9/3

x = 3.

Answer:

The equation is 3|x| - 1 = 8. To solve this equation, we first need to consider the absolute value of x.

The absolute value of x is defined as |x| = x for x ≥ 0, and |x| = -x for x < 0.

We have 3|x| - 1 = 8, so we have to consider two cases:

x ≥ 0: in this case, |x| = x and we have 3x - 1 = 8, which gives x = 3 or x = 9.

x < 0: in this case, |x| = -x and we have 3(-x) - 1 = 8, which gives -3x - 1 = 8, and then x = -3 or x = -9.

So the solution to the equation is x = 3 or 9 or x = -3 or -9.

Step-by-step explanation:

Brody had his computer repaired at Store A. His bill was:

Initial Repair Cost = $1,200

Sales Tax of 6 percent = $72.00

Gratuity of 15 percent

Explain how you would calculate the gratuity for the services provided.
HELPPPPP

Answers

Answer:

1200 x 15%= $180.00

you don't need to add Gratuity on the Sales Tax

Step-by-step explanation:

Answer:

Add the repair cost and tax to get the total amount. Then multiply the total amount by 0.15 to find the gratuity.

in the x y coordinate plane, which of the following points must lie on kx + 3y + 6 if k = -1/2 ​

Answers

Answer:

honestly, I got no idea. I can tell you though - go us Desmos kid. it'll help you more than any person in this platform.

don't thank me

Step-by-step explanation:

Desmos

use Desmos

Lesson 1: What Is a Function?

A. Distinguish between relations and functions.
B. Calculate domain and range of functions algebraically.
C. Identify domain and range of functions graphically

Answers

The answer is B. Calculate domain and range of functions algebraically

a person travels for 8 hrs she has a break between 3.00 -3.30pm then another break between 4.00 - 5.00 and then another break between 6.30 -7.30 how long are they traveling

Answers

Answer: 5 1/2 hours OR 5 hrs 30 minutes

Step-by-step explanation:

She travels for 8 hours

Out of this, 2 1/2 hours she takes a break.

She has actually travelled 5 1/2 hours

Find the missing number so that the equation has infinitely many solutions.

3( –x – 7) + x + 5 = – 4(5x + 4)

Answers

equation has infinitely many solutions has the same number on both sides of the equal sign

-3x -21 + x + 5 = -20x -16

-2x -16 = -20x -16

so either you have -18x on the left or +18x in the right

Find the area of the figure

Find the area of the figure

Answers

I believe it’s 1,680 considering area is multiplication

You weigh a group of eight kittens for 6 days and get the following data (in lb.):


1.6, 1.4, 1.1, 1.8, 1.3, 1.8, 1.2, 1.4


Select the correct average weight. Round your answer to one decimal place.



1.8 lb.
1.8 lb.

1.1 lb.
1.1 lb.

1.5 lb.
1.5 lb.

1.4 lb.

Answers

Answer:

1.5

Step-by-step explanation:

For the function G(x)=5x+5−3x−4, evaluate G(8).

Answers

G(8) = 40 + 5 - 24 - 4

45 - 28 = 17

G(8) = 17

Amanda tells you that because a variable is in the denominator, the equation 3/x+1/3 = 5/6 becomes unsolvable. Amanda explained there is a value for x that makes the denominator 0, and you can't divide by 0. Demonstrate to Amanda how the equation is still solvable and explain your reasoning.

Answers

Answer:

x=6

Step-by-step explanation:

5/6-1/3=3/6 or 1/2 so 3/x=1/2 and since 3/6=1/2 x=6

Yesterday 170 guests at a hotel called for room service, and 255 guests did not call for ro service. What percentage of the guests at this hotel called for room service yesterday?

Answers

Answer: 40%

Step-by-step explanation: you would need to find the total amount of guests which would be 425 since you’d add 170 and 255, then take the amount of guests that called for room service which is 170 and divide that by the total amount of guests 425 and you would get .4 then to get the percent you would multiply .4 by 100 which would equal 40%

modeled by a cylinder with diameter 15 feet

Answers

what’s the question?

wat is the sum of 13.75 and -11.25

Answers

Answer:

2.5

Step-by-step explanation:

Answer:

2.5

Step-by-step explanation:

use the keep change change rule

13.75 - keep

  +     - change into minus

-11.25 - change into positive 11.25

The distance that a jogger travels at a constant speed of 6.5 miles per hour can be modeled by the linear function f(x)=6.5x, where x is the time in hours the jogger runs. What is the domain of this function? How would a graph of this function show it?

Answers

domain : [ -infinite , infinite [
graph should be going up diagonally .

The distance that a jogger travels at a constant speed of 6.5 miles per hour can be modeled by the linear

The domain of the function f(x) = 6.5x will be a positive real number.

What are domain and range?

The domain means all the possible values of x and the range means all the possible values of y.

The distance that a jogger travels at a constant speed of 6.5 miles per hour can be modeled by the linear function f(x) = 6.5x, where x is the time in hours the jogger runs.

We know that time is a scalar quantity. Then the value of the time is always greater than equal to zero.

x ≥ 0

The domain of the function f(x) = 6.5x will be a positive real number.

More about the domain and range link is given below.

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A triangle has two sides of lenghts 8 and 10. what value could the length of the third sird side be?​

Answers

Answer:

Step-by-step explanation:

sum of any two sides > third side

difference of any two sides < third side.

8+10=18

10-8=2

2<third side <18

would appreciate the help ty!!!

would appreciate the help ty!!!

Answers

By using the concept of linear progression and some algebraic handling, we conclude that Joe will earn an amount of $ 31 700 in the 14th year.

How to determine the future income of a worker

According to the statement, we have a case of linear progression as income increases at same rate in time. Linear progressions are described by this formula:

c' = c + r · t     (1)

Where:

c - Initial amountc' - Current amountr - Increase ratet - Time

First, we calculate the increase rate:

r = (29 600 - 22 600)/10

r = 700

Now we proceed to find when Joe will earn an annual income of $ 31 700:

31 700 = 22 600  + 700 · t

t = 13

By using the concept of linear progression and some algebraic handling, we conclude that Joe will earn an amount of $ 31 700 in the 14th year.

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Help me answer this question :((((

Help me answer this question :((((

Answers

Answer:

1

c

2

h

Step-by-step explanation:

1

For the first question, the mean is calculated by adding all the items together and dividing it by the amount of them.

In this case, we add 32000 to 4600 to create 36600, this is the cost for 6 cars. To find the mean, we divide by 6. 36600 divided by 6 is 6100

2

We are looking for the original fee of 50 on its own, alongside 10 lots of 25.

The only version that correctly represents this is 50 + 25(10)

What is the meaning of "unique"?

What is the meaning of "unique"?

Answers

Answer:

In this context, unique means existence of only one value for that element and no more than one value

Step-by-step explanation:

help for 40 points and brainliest

help for 40 points and brainliest

Answers

\(\sf 2^{-6}\)

these two options apply

\(\rightarrow \sf \dfrac{1}{2^6}\)

\(\rightarrow \sf 2^{-2} \ * \ 2^4 \ * \ 2^{-8}\)

in decimals : 0.015625

Answer:

Option C and D

Step-by-step explanation:

≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡

Example:

If the given exponent is a⁻ᵇ, then the result will be 1/aᵇ.

This exponent includes a negative sign. To make the exponent positive, take the exponent's reciprocal and change the negative sign to a positive sign. The same will be done to the given expression.

≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡

First, take the exponent's reciprocal as said above.

⇒ \(2^{-6}\)

⇒ \(\frac{1}{2^{-6} }\)

Now, change the exponent's sign.

⇒ \(\frac{1}{2^{-6} }\)

⇒ \(\frac{1}{2^{6} }\)

Now, simplify the term.

⇒ \(\frac{1}{2^{6} }\)

⇒ \(\frac{1}{2 \times 2 \times 2 \times 2 \times 2 \times 2} }\)

⇒ \(\frac{1}{8 \times 8}\)

⇒ \(\frac{1}{64}\)

Using the simplified result we obtained, let's verify all the options to see which is equivalent to the term.

≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡

A)------------------------------------------------------------------------------------------------------

Keep in mind that the exponent is the number of times the base needs to multiply itself.

\(-2^{6} \rightarrow -2 \times -2 \times -2 \times -2 \times -2 \times -2\)

NOTE: If there are even number of "-", then the result should be positive. If there are odd number of "-", then the result should be negative.

\(-2 \times -2 \times -2 \times -2 \times -2 \times -2\)

⇒ \(2 \times 2 \times 2 \times 2 \times 2 \times 2\)

⇒ \(64\)

\(-2^{6} = 64 \neq \frac{1}{64}\)

B)------------------------------------------------------------------------------------------------------

Since -64 is already a simplified term, we can compare this with the simplified result.

\(-64 \neq \frac{1}{64}\)

C)------------------------------------------------------------------------------------------------------

\(\frac{1}{2^{6}}\)

⇒ \(\frac{1}{2 \times 2 \times 2 \times 2 \times 2 \times 2 }\)

⇒ \(\frac{1}{8 \times 8 }\)

⇒ \(\frac{1}{64}\)

\(\frac{1}{2^{6} } = \frac{1}{64} = \frac{1}{64}\)

D)------------------------------------------------------------------------------------------------------

\(2^{-2} \times 2^{4} \times 2^{-8}\)

⇒ \(\frac{1}{2^{2}} } \times 16 \times \frac{1}{2^{8} }\)

⇒ \(\frac{1}{4} \times 16 \times \frac{1}{256}\)

⇒ \(\frac{1}{4} \times 1 \times \frac{1}{16}\)                                                                               [16² = 256]

⇒ \(\frac{1}{4} \times \frac{1}{16}\)

⇒ \(\frac{1}{64}\)

\(2^{-2} \times 2^{4} \times 2^{-8} = \frac{1}{64} = \frac{1}{64}\)

E)------------------------------------------------------------------------------------------------------

\(2^{3} \times 2^{-2}\)

⇒ \(2^{3 - 2}\)

⇒ \(2^{1} = 2\)

\(2^{3} \times 2^{-2} = 2 \neq \frac{1}{64}\)

≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡

select ALL of the graphs that could represent a proportional relationship ​

select ALL of the graphs that could represent a proportional relationship

Answers

Answer:

The top two options for graphs

what is the y coordinate of the point shown in the graph ​

Answers

Answer:

What's the graph?

Step-by-step explanation:

the sum of two numbers is 27. one number is 2 times as large as the other. what are the numbers​

Answers

Answer:

9 and 18

Step-by-step explanation:

Since we don’t know the number, I put x as one of the numbers. Since the other number should be two times as large, that would be 2x.

2x+x=27

3x=27

x=9

To find the other number, which is 2x multiply by 2. So 18

Answer:

one number=9

Second number=18

Step-by-step explanation:

The sum of two numbers =27

one number is 2 times as large as the other

Solution

Let one number=X

Second number=2x

X+2X=27

3x=27

X=27/3

X=9

So one number=9

Second number=18

Parallelogram DEFG is transformed to parallelogram VSTU.

Parallelogram D E F G is reflected diagonally to form parallelogram V S T U.

Answers

The True statement is parallelogram DEFG is the pre-image because it is not the result of the transformation.

What is Transformation?

A point, line, or geometric figure can be transformed in one of four ways, each of which affects the shape and/or location of the object. Pre-Image refers to the object's initial shape, and Image, after transformation, refers to the object's ultimate shape and location.

Given:

Parallelogram DEFG is transformed to parallelogram VSTU.

It changes from parallelogram DEFG to parallelogram VSTU.

According to how it is said, DFEG is the initial parallelogram or pre-image that is changed to create VSTU, VSTU is changed from DEFG.

The following is an accurate statement concerning the transformation:

As the parallelogram DEFG is not the outcome of the transformation, it is the pre-image.

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The correct Question attached here are as follow:

(Q). Parallelogram DEFG is transformed to parallelogram VSTU. Which statement about the transformation is true?

Parallelogram DEFG is the pre-image because it is not the result of the transformation.Parallelogram DEFG is the image because it is the result of the transformation.Parallelogram VSTU is the pre-image because it is the result of the transformation.Parallelogram VSTU is the image because it is not the result of the transformation.

A. (0,3)
B. (0,1)
C. (0,1)
D. (0,2)

A. (0,3)B. (0,1)C. (0,1)D. (0,2)

Answers

Answer:

c

Step-by-step explanation:

How to solve and answer to the question

How to solve and answer to the question

Answers

Answer:

x = 29

Step-by-step explanation:

147 + 147 + 2x - 25 + 2x - 25 = 360

294 + 2x - 25 + 2x - 25 = 360

294 + 2(29) - 25 + 2(29) - 25 = 360

294 + 58 - 25 + 58 - 25 = 360

352 - 25 + 33 = 360

327 + 33 = 360

360 = 360

x = 29

Select the equation that is the inverse of the given function.
f (x) = StartFraction x minus 3 Over 5 EndFraction

Answers

The equation that is the inverse of the function \(f(x) = \frac{x-3}{5}$\) is \(f^{-1}(x) = 5x + 3$\).

What is inverse of function?

A function that "undoes" another function is called an inverse. In other words, if f(x) produces y, then y entered into the opposite of f produces x. An invertible function is one that has an inverse, and the inverse is represented by the symbol \(f^-1\).

According to question:

To find the inverse of the function \(f(x) = \frac{x-3}{5}$\), we can follow these steps:

Replace f(x) with y;

\($y = \frac{x-3}{5}$\)

Solve for x in terms of y:

5y = x - 3

x = 5y + 3

Replace y with \($f^{-1}(x)$:\)

\($f^{-1}(x) = 5x + 3$\)

Therefore, the equation that is the inverse of the function \(f(x) = \frac{x-3}{5}$\) is \(f^{-1}(x) = 5x + 3$\).

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Select the correct expanded form for (Two-thirds) Superscript 4.
Two-thirds times two-thirds times two-thirds times two-thirds
Two-thirds times two-thirds times two-thirds
Two-thirds + two-thirds + two-thirds + two-thirds
Two-thirds times 4

Answers

The correct expanded form using Laws of exponents is:

Two-thirds times two-thirds times two-thirds times two-thirds

How to use laws of exponents?

Some of the laws of exponents are:

1) When multiplying like bases, keep the base the same and add the exponents.

2) When raising a base with a power to another power, keep the base the same and multiply the exponents.

3) When dividing like bases, keep the base the same and subtract the denominator exponent from the numerator exponent.

Now, we want to solve the expression given as: (²/₃)⁴

When we expend this, we arrive at:

²/₃ × ²/₃ × ²/₃ × ²/₃

This among the options is Option A which is:

Two-thirds times two-thirds times two-thirds times two-thirds

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Solve for x. Round to the nearest tenth, if necessary.

Solve for x. Round to the nearest tenth, if necessary.

Answers

Using Trigonometry, the value of x in the right triangle is 17.1

Since we have a right angle triangle ; The angle L can be obtained thus ;

L = 180 - (90+67)

L = 23

Using Trigonometry:

Sin23° = opposite/ hypotenuse

Opposite= 6.7

hypotenuse= x

Sin23° = 6.7/x

x = 6.7/sin(23°)

x = 17.14

Therefore, the value of x to the nearest tenth is 17.1

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Need help please thanks

Need help please thanks

Answers

Answer:

6.

Just count the x's on the graph...

What is the volume of the solid whose cross- sections are circular disks perpendicular to the x-axis and with diameters on the region bounded by the curves y = x and y=x^2?

Answers

Answer:

the volume of the solid is \(\frac{\pi }{120}\)

Step-by-step explanation:

Given the data in the question;

y = x and y = x²

so

x = x²

x - x² = 0

Radius will be; r = ( x - x² )/2

Area of the circular disk πr² = π[ ( x - x² )/2 ]²

A = \(\frac{\pi }{4}\)( x - x² )²

So, our volume will be;

V = ₀∫¹ A(x) dx

we substitute

= ₀∫¹ \(\frac{\pi }{4}\)( x - x² )² dx        

{ lets expand; ( x - x² )² = x(x-x²) -x²(x-x²) = x² - x³ - x³ + x⁴ = x² + x⁴ - 2x³  }

so we have;

=  ₀∫¹ \(\frac{\pi }{4}\)( x² + x⁴ - 2x³ ) dx  

= \(\frac{\pi }{4}\) \([\) \(\frac{x^3}{3}\) + \(\frac{x^5}{5}\) - \(\frac{2}{4} x^4\) \(]^1_0\)

= \(\frac{\pi }{4}\)[ \(\frac{1}{3}\) + \(\frac{1}{5}\) - \(\frac{2}{4}\) ]

= \(\frac{\pi }{4}\)[ \(\frac{1}{30}\) ]

V = \(\frac{\pi }{120}\)

Therefore, the volume of the solid is \(\frac{\pi }{120}\)

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