1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Elenna [48]
3 years ago
5

Suppose matrix D is the inverse of matrix C. Which of the following is equal to D?

Mathematics
2 answers:
denpristay [2]3 years ago
7 0

CDD cause CD=I and then ID=D

Hope I helped.

mr Goodwill [35]3 years ago
6 0

Answer: (A) CDD

if D=C^-1

then

C D D = (C C^-1) D = I D = D

(where I is the identity matrix)

You might be interested in
Tell whether the ratios form a proportion 1/3 and 7/21
wolverine [178]
It is proportional ;)
3 0
2 years ago
What adds to 1 and multiplies to 2
kicyunya [14]
-2 and 1.

Hope this helps!
3 0
3 years ago
Read 2 more answers
PLZ answer quick!!!!!
Blizzard [7]

Number of items sold by Shelley = 3 items.

Let us assume cost of each item sold by Shelley = $ x each.

Total cost of 3 items for Shelly sold = 3*x = 3x.

Number of items sold by Billy Bob = 4 items.

The cost of each item sold by Billy Bob = $2.25 less than the items that Shelley bought = $(x-2.25) each.

Total cost of 4 items for Billy Bob sold = 4*(x-2.25) = 4(x-2.25).

Both Shelley and Billy Bob paid the same amount of money. So, we can setup an equation now.

a) Total cost of 4 items for Billy Bob sold=Total cost of 3 items for Shelly sold.

4(x-2.25) = 3x

b) Solving equation for x now.

Distributing 4 over (x-2.25), we get

4x - 4*2.25 = 3x.

4x -9 = 3x.

Adding 9 on both sides, we get

4x -9+9 = 3x+9

4x =3x+9.

Subtracting 3x from both sides, we get

4x-3x =3x-3x+9.

x = 9.

c) Checking the solution of the equation by plugging x=9 in equation we got above.

4(x-2.25) = 3x  => 4(9-2.25)= 3*9

               => 4*6.75 = 27

               => 27 = 27.

We got left side = right side. So the solution x=9 is correct.

d) The cost of each item sold by Billy Bob = 9-2.25 = $6.75

Therefore, the cost of each item sold by Shelley is $9 and cost of each item sold by Billy Bob is $6.75.

3 0
3 years ago
Create a scenario that leads to an inequality of the form ax + b > c. You can use any of the inequality symbols (>, ≥, &lt
Ann [662]

Answer:

5x +3y>-15

5(0)+3(0)

0+0=   0 > -15

Step by step explanation

We have to create a scenario that leads to an inequality of the form ax + b > c.

Word problem: A family went to an park. Entry fee of the park for a family is $20 and the cost of a ride is $10 per person. The family spent more than $100 on that ride.

The required inequality is

Subtract 20 from both sides.

Divide both sides by 10.

It means the number of rides must be greater than 8.

6 0
3 years ago
Read 2 more answers
Helppp me i neeed help
dexar [7]

Total no. of buttons = 300 + 700 + 1000

+ 500 = 2500

Possibility for a person to pick a pink button = 300/2500 = (3/25)%

Amount of pink buttons she can expect her friends to pick = 50(3/25) = 6

She can expect to make 6 pink barrettes.

6 0
3 years ago
Read 2 more answers
Other questions:
  • Your friend gave you a gift card to a new restaurant. After you spend $36$36 on dinner, there is a balance of $44$44 left on the
    13·2 answers
  • What is the middle number of 8 and 15
    6·2 answers
  • An exhibit at Tabu World Square in Japan includes a scale model of the Empire State Building. The model was built using a scale
    11·1 answer
  • Brent divided 31/2 by 7 what number did he get
    13·1 answer
  • In de pas monch. Goran rencad 6 video games and 3 DVDS. The rental price for each video game was $290. The rental price for each
    10·1 answer
  • Xavier is attempting to recreate a problem his teacher showed him in class. To do so, he creates the table below.
    7·2 answers
  • Write an algebraic expression with two terms to represent the total of balloons sold my all 3. in terms C
    14·1 answer
  • This right here please
    9·1 answer
  • Which statement about the data in the histogram is true?<br>​
    13·2 answers
  • Which is the BEST definition of dilation?
    6·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!