HELP HELP HELP !!!
Which equation shows that the product of a square matrix A and its identity matrix I is A?

HELP HELP HELP !!!Which Equation Shows That The Product Of A Square Matrix A And Its Identity Matrix

Answers

Answer 1

Answer:

Option B

Step-by-step explanation:

The multiplication process of matrices works by multiplying the first row of the  first matrix by the first column of the second matrix. The same goes with the second row of the first matrix by the second column of the other matrix. Below is the solution why option B is the correct answer.

[tex]A = \left[\begin{array}{ccc}8&11\\13&5\\\end{array}\right][/tex]              

[tex]B = \left[\begin{array}{ccc}1&0\\0&1\\\end{array}\right][/tex]  ← This is the Identity Matrix.

The attached screenshot shows the solution of the multiplication process. In essence, if you multiply any matrix by the identity (Matrix B), you should end up with your original matrix. Thus, multiplying Matrix A by the Identity matrix results in the same values as Matrix A.                                              

Therefore, the correct answer is B.                                    

HELP HELP HELP !!!Which Equation Shows That The Product Of A Square Matrix A And Its Identity Matrix

Related Questions

Make A the subject of the formula
r=1
А
3

Answers

Step-by-step explanation:

[tex]r = \sqrt{ \frac{А}{3} } [/tex]

[tex] {r}^{2} = \frac{А}{3} [/tex]

[tex]А = 3{r}^{2} [/tex]

HOPE IT HELPS YA


solve for x and explain

Answers

Answer:

[tex]x=22[/tex]

Step-by-step explanation:

Because [tex]\angle ABC=\angle ABD+\angle DBC=80^{\circ}[/tex], we have that [tex](2x+4)+(2x-12)=80[/tex].

Combining like terms on the left side gives [tex]4x-8=80[/tex].

Adding [tex]8[/tex] to both sides gives [tex]4x=88[/tex].

Dividing both sides of the equation by [tex]4[/tex] gives [tex]\boxed{x=22}[/tex].

I haven’t done this in a while but I’ll try ….

2x - 12 + 2x + 4 = 80
4x - 8 = 80
+ 8 = + 8
4x = 88
Divide by 4
x = 22
Maybe… I hope it’s right!

Is MNO similar to PQO

Answers

Answer:

Yes MNO is similar to PQO

Name an angle supplementary to

Answers

Answer:

Here is your answer dear,

Step-by-step explanation:

angle AOD and angle EOC are supplementry angle

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MARK ME AS BRAINLIST

what is the surface area of this design?

Answers

The surface area of the design would be 160

Which best represents the domain for Golf Galore?


A. All real numbers

B. 1 ≤ x ≤ 3

C. { 1 ,2 ,3 }

D. x ≤ 3

Answers

Answer:

explain below

Step-by-step explanation:

I think this question missed some part like the minimum and maximum reservation time (such as 1 to 3 hours), if so.. the answer is B. 1≤x≤3

Subtract the linear expressions. (2/5x−1)−(1/4x+2) What is the difference? Enter your answer in the box. Enter fractions as simplified fractions.

Answers

Answer:

3/20x−3

Step-by-step explanation: TOOK THE FOR K12 HOPE THIS HELPS

The difference of the given expression is 3/20 x - 3.

Given that, (2/5x−1)−(1/4x+2).

What is the subtraction of expressions?

To subtract an algebraic expression from another, we should change the signs (from '+' to '-' or from '-' to '+') of all the terms of the expression which is to be subtracted and then the two expressions are added.

Now, (2/5x−1)−(1/4x+2)

= (2/5 x - 1/4 x) -1 - 2

= (8/20 x - 5/20 x) - 3

= 3/20 x - 3

Therefore, the difference of the given expression is 3/20 x - 3.

To learn more about the subtraction of expression visit:

https://brainly.com/question/12959016.

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Vladimir is looking to retire in 10 years. He has a plan to put $25,000 into an investment today that earns interest at a fixed amount per year. What would be a reasonable domain and range for a function modeling the total amount of the investment, including interest?
25 Points for the correct answer

Answers

The domain and range for a function modeling the total amount of the investment, including interest are as follows;

Domain, X = {0<= years <= 10}Range, Y (total amount) = {$25,000<= Y <= 25,000( 1 + 10R)}

The starting principal amount, P is $25,000.

Let the interest rate per year, be represented as, R (%)

Time of investment, T = 10 years

In essence, after 10 years, the total amount Vladimir has is;

Total amount = 25,000( 1 + xR).

In essence, the domain (No. of years ) is;

Domain, X = {0<= years <= 10}

Range, Y (total amount) = {$25,000<= Y <= 25,000( 1 + xR)}

Read more:

https://brainly.com/question/14489958

(0, -4) and (-1, -2)
Write the slope intercept form of the equation for f the line through the given points

Answers

Answer:

y = -2x - 4

Step-by-step explanation:

First, I'll find the slope by subtracting the y-values and x-values of each point from each other, as shown below:

(-2 - (-4))/(-1 - 0) = 2/-1 = -2

We already have the y=intercept: (0, -4). From this, we can write a y = mx + b (slope intercept form) equation, with m being our slope and b being our y-intercept. It looks like y = -2x - 4.

There is a rectangular lot in the garden, with 6 ft in length and 4 ft in width. You plan to expand the lot by an equal length around its four sides, and make the area of the expanded rectangle 48 ft^2. How long should you expand the original lot in four directions?


You should expand the original lot by…
Please type ft to represent feet.

Answers

So the amount you are increasing it by is equal on both sides. Firstly let’s look at the factors of 48, (1,2,3,4,6,8,12,16,24 and 48) the only factors that are can be equal increase from 4 and 6 is by 2 ft giving us a length of 8 and a width of 6

Answer:

2 ft

Step-by-step explanation:

Given:

l = 6 ftw = 4 ftExtended area = 48 ft²Extension= x

Find x:

(6 + x)(4 + x) = 48x² + 10x + 24 = 48x² + 10x + 25 = 49(x + 5)² = 49x + 5 = 7x = 7 - 5x = 2

What is the answer for x?

Answers

answer:

115 degrees

explanation:

1)

12x+55=23x

55=11x

5=x

2)

23(5)

115

The answer:
The X is for slopes

eugheugh eughhhh I've been listening to my comfort playlist stressing about this test for too long Please just help ;-;

Answers

Answer:

1. Incorrect because it's suppose to be -4/5, -1/10, 7/10

2. Incorrect because it's suppose to be -7/8, -3/8, -3/4

3. Correct -2/3, -5/9, 2/9

4. Incorrect because it's suppose to be -4/7, -5/14, 6/7

Evaluate the expression.

{[(20−32)÷(−6)]2−11}÷(−7)

What is the value of the expression?

Enter your answer in the box.

Answers

The value of the expression is 1

From the question,

We are to evaluate the value of the expression {[(20−32)÷(−6)]2−11}÷(−7)

To do this, we will clear the brackets one after the other.

The expression can be simplified as shown below:

{[(20−32)÷(−6)]2−11}÷(−7)

{[(-12)÷(−6)]2−11}÷(−7)

Then, we get

{[2]2−11}÷(−7)

{4−11}÷(−7)

{-7}÷(−7)

-7 ÷ -7

= 1

Hence, the value of the expression is 1

Learn more here: https://brainly.com/question/24421152

I need help with these two

Answers

Answer:

2) D

4) A

Step-by-step explanation:

y=3(x-1)

multiply

3(x-1)

then y=3x-3

y+1=4/3(x+3)

multiply 4/3(x+3)

y=4/3x+3

Answer:

1) D. y = 3x-3

2) A. y = 4/3 x+3

Step-by-step explanation:

1)

Rearrange:

Rearrange the equation by subtracting what is to the right of the equal sign from both sides of the equation : y-(3*x-3)=0

Step 1:

Equation of a Straight Line

Solve   y-3x+3  = 0

Tiger recognizes that we have here an equation of a straight line. Such an equation is usually written y=mx+b ("y=mx+c" in the UK).

"y=mx+b" is the formula of a straight line drawn on Cartesian coordinate system in which "y" is the vertical axis and "x" the horizontal axis.

In this formula :

y tells us how far up the line goes

x tells us how far along

m is the Slope or Gradient i.e. how steep the line is

b is the Y-intercept i.e. where the line crosses the Y axis

The X and Y intercepts and the Slope are called the line properties. We shall now graph the line  y-3x+3  = 0 and calculate its properties

Graph of a Straight Line :

Calculate the Y-Intercept :

Notice that when x = 0 the value of y is -3/1 so this line "cuts" the y axis at y=-3.00000

 y-intercept = -3/1  = -3.00000  

Calculate the X-Intercept :

When y = 0 the value of x is 1/1 Our line therefore "cuts" the x axis at x= 1.00000

 x-intercept = 3/3  =  1  

Calculate the Slope :

Slope is defined as the change in y divided by the change in x. We note that for x=0, the value of y is -3.000 and for x=2.000, the value of y is 3.000. So, for a change of 2.000 in x (The change in x is sometimes referred to as "RUN") we get a change of 3.000 - (-3.000) = 6.000 in y. (The change in y is sometimes referred to as "RISE" and the Slope is m = RISE / RUN)

   Slope     =  6.000/2.000 =  3.000  

Geometric figure: Straight Line

 Slope = 6.000/2.000 = 3.000

 x-intercept = 3/3 = 1

 y-intercept = -3/1 = -3.00000

2)

Rearrange:

Rearrange the equation by subtracting what is to the right of the equal sign from both sides of the equation :

                    y-(4/3*x+3)=0

Step 1:

Simplify   4/3

Equation at the end of step  1:

y -  ((4/3 • x) +  3)  = 0

Step 2: Rewriting the whole as an Equivalent Fraction

Adding a whole to a fraction

Rewrite the whole as a fraction using  3  as the denominator :

3 = 3/1 = 3 · 3/3

Equivalent fraction : The fraction thus generated looks different but has the same value as the whole

Common denominator : The equivalent fraction and the other fraction involved in the calculation share the same denominator

Adding fractions that have a common denominator :

Adding up the two equivalent fractions

Add the two equivalent fractions which now have a common denominator

Combine the numerators together, put the sum or difference over the common denominator then reduce to lowest terms if possible:

4x + 3 · 3/3 = 4x+9/3

Equation at the end of step  2:

y - (4x+9)/3=0

Step 3:

Rewriting the whole as an Equivalent Fraction :

Subtracting a fraction from a whole

Rewrite the whole as a fraction using  3  as the denominator :

y = y/1 = y · 3/3

Adding fractions that have a common denominator :

Adding up the two equivalent fractions

y • 3 - ((4x+9))     3y - 4x - 9

————————————————  =  ———————————

       3                  3      

Equation at the end of step

3

:

 3y - 4x - 9

 ———————————  = 0  

      3      

STEP

4

:

When a fraction equals zero :

4.1    When a fraction equals zero ...

Where a fraction equals zero, its numerator, the part which is above the fraction line, must equal zero.

Now,to get rid of the denominator, Tiger multiplys both sides of the equation by the denominator.

Here's how:

 3y-4x-9

 ——————— • 3 = 0 • 3

    3    

Now, on the left hand side, the  3  cancels out the denominator, while, on the right hand side, zero times anything is still zero.

The equation now takes the shape :

  3y-4x-9  = 0

Equation of a Straight Line

4.2     Solve   3y-4x-9  = 0

Tiger recognizes that we have here an equation of a straight line. Such an equation is usually written y=mx+b ("y=mx+c" in the UK).

"y=mx+b" is the formula of a straight line drawn on Cartesian coordinate system in which "y" is the vertical axis and "x" the horizontal axis.

In this formula :

y tells us how far up the line goes

x tells us how far along

m is the Slope or Gradient i.e. how steep the line is

b is the Y-intercept i.e. where the line crosses the Y axis

The X and Y intercepts and the Slope are called the line properties. We shall now graph the line  3y-4x-9  = 0 and calculate its properties

Graph of a Straight Line :

 

 

Calculate the Y-Intercept :

Notice that when x = 0 the value of y is 3/1 so this line "cuts" the y axis at y= 3.00000

 y-intercept = 9/3  =  3  

Calculate the X-Intercept :

When y = 0 the value of x is 9/-4 Our line therefore "cuts" the x axis at x=-2.25000

 x-intercept = 9/-4  = -2.25000  

Calculate the Slope :

    Slope     =  2.667/2.000 =  1.333  

Geometric figure: Straight Line

 Slope = 2.667/2.000 = 1.333

 x-intercept = 9/-4 = -2.25000

 y-intercept = 9/3 = 3

what is 3(2 - 5y) math

Answers

Answer:

-15y + 6

Step-by-step explanation:

3(2 - 5y)(3)(2) + (3)(-5y)6 + (-15y)-15y + 6

Therefore, the answer is -15y + 6.

Factorise
x2 + 5x - 24

Answers

Answer:

(x+8)(x-3)

Step-by-step explanation:

x2+5x-24

product 1 ×-24= -24

sum -3 and 8(x2 -3x )(+ 8x -24)x(x-3) +8(x-3)(x+8)(x-3)

I need help! I don’t know this problem can you figure this out?

Answers

The exterior angle theorem states that the measure of each exterior angle of a triangle is equal to the sum of the opposite and non-adjacent interior angles.

Remember that the two non-adjacent interior angles opposite the exterior angle are sometimes referred to as remote interior angles.

The exterior angle is m < 2a°, while the remote interior angles inside the triangle are m < (a + 10)° and m < 44°.

The following equality statement reflects the exterior angle theorem:

m < (a + 10)° + m < 44° = m < 2a°

At this point, you could solve for the value of "a" algebraically:

a + 10 + 44 = 2a

a + 54 = 2a

Subtract "a" from both sides:
a - a + 54 = 2a - a
54 = a

Now that you have the value for a = 54, substitute this value into the given angles to know their measures:

m < (a + 10)° + m < 44° = m < 2a°

m < [(54) + 10] + m < 44 = m < 2(54)

m < 64° + m< 44° = m < 108°

Therefore:

m < (a + 10)° = 64°
m < 2a° = 108°

5. what equation passes through the 2 points
(3, 1) and (7, -3)​

Answers

Answer:

Equation: y = -1x + 4

Step-by-step explanation:

In order to create an equation, you need to put it in slope-intercept form ( y = mx + b ). The best way to figure out to create your equation is to graph the points. 'Y' means the y-axis. 'mx' refers to the slope of a particular line and b is concluding where the line crosses the y-axis.

How do you write 3
17/
18
as a decimal?

Answers

Answer:

3 17/18 rounds up to 3.94

what is the domain of h please help :(((((((​

Answers

Answer:

Domain is X-values

Range is Y-VALUES

domain as follows: -7,-3, -1, 1, and 4

Range as follows: -2,7, 6, and 3

I think the domain of h is 3

Step-by-step explanation:

jazz sold 1/2 sack of vegetable pear and 5/2 sack of squash. how many sacks of vegetables did he sell altogether?​

Answers

Answer:

Jazz sold 3(6/2)sacks of vegetables.

Step-by-step explanation:

5/2 + 1/2 = 6/2. If you convert 6/2 into a mixed number you get 3.

dinosuar09 says:

Sooo I need help doing this math problem

3/4 is equal to what desimal

a. 0.34
b. 2.5
c. 0.75
d. 0.3

Answers

Answer:

the answer is C

Step-by-step explanation:

3/4 = 0.75

C is the answer.If 3/4 was a decimal it would be 0.75 so C

1. Sarah a 20-ounce jar of strawberry jam for $4.00. What is the unit price per ounce?
2. Julie bought a 24-ounce can of tomato sauce for $6.00. What is the unit price per ounce?

Answers

Answer:

unit price for jam= 20 cents

unit price for tomato sauce= 25 cents

Step-by-step explanation:

Given: 4(-2x+1) - 2x = 44
Prove:x = -4
Statements...
1
2
3
4
5
Reasons:
1
2
3
4
5

The statement goes with the reason hopefully that makes sense please help me

Answers

Answer:

Step-by-step explanation:

(V. An aeroplane is flying parallel to the Earth's surface at a speed of 175 m/sec and at a height of 600 m. The angle of elevation of the aeroplane from a point on the Earth's surface is 37°. After what period of time does the angle of elevation increase to 53° ? (tan 53° = 1.3270, tan 37° = 0.7536) ​

Answers

dot on top of earth = plane position at the time of observation (right one when 37°, left one 53°)

then the geometry is zoomed on the left side

Hi, i am in 8th grade math and i really just need someone to explain the steps on how to slove these types of quetsions-


1. -12(k+4)= 60 (slove for k)


2, 8(3a+)=9(2a-4) (solve for a)


i dont really pay attention and im failing. this is very forgein to me it just looks ike a cluster of numbers and signals. cn you step by step expail it please i will give a brainly!

Answers

Answer:

1. k=-9

2. a=-12

Step-by-step explanation:

1. -12(k+4)=60

use distributive property

   -12k-48=60

add 48 to both sides

   -12k=108

divide both sides by -12

   k=-9

2. 8(3a)=9(2a-4)

   use distributive property

   24a=18a-36

   subtract 18a on both sides

  6a=-36

  divide both sides by 6

   a=-12

WILL MAKE BRAINLIEST Determine the value of x

a) 7.8

b) 4.62

c)6
d) 0.22​

Answers

Answer:

I came to the answer of 6.

find angle DBC !!!!!!

Answers

Answer:

50°

Step-by-step explanation:

Answer:
50° is the angle DBC

round 2.794 to the tenths place

Answers

2.8

The tenths place is right after the decimal, so when we round 2.794 to the nearest tenths place, we get 2.8

Hope this helps! Have a good day :)

17.2 x 4.6 show working out in column method

Answers

Answer:

17.02

Step-by-step explanation:

2

41

17.2

x4.6

1

1022

+6880

17.02

be sure to cross out the 41 on the second line when you start multiplying 17.2 by 4

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