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
Paha777 [63]
4 years ago
7

Identify each matrix A such that A^2 has identical diagonal elements?

Mathematics
1 answer:
Maksim231197 [3]4 years ago
6 0

Answer:

The correct matrices are:

Matrix:

7 1 5

1 5 7

5 7 1

all diagonal elements of A^2 are: 7^2 + 1^2 + 5^2

Matrix:

9   18  27

27 -9  18

18  27 9

all diagonal elements of A^2 are: 9^2 + 27*18 + 18*27   or (-9)^2

Matrix:

8 1 6

6 8 1

1 6 8

all diagonal elements of A^2 are: 8^2 + 6*1 + 1*6

You might be interested in
how many 4 digit numbers n have the property that the 3 digit number obtained by removing the leftmost digit is one ninth of n
Tom [10]

Answer:

  7

Step-by-step explanation:

We want to find the number 4-digit of positive integers n such that removing the thousands digit divides the number by 9.

__

Let the thousands digit be 'd'. Then we want to find the integer solutions to ...

  n -1000d = n/9

  n -n/9 = 1000d . . . . . . add 1000d -n/9

  8n = 9000d . . . . . . . . multiply by 9

  n = 1125d . . . . . . . . . divide by 8

The values of d that will give a suitable 4-digit value of n are 1 through 7.

When d=8, n is 9000. Removing the 9 gives 0, not 1000.

When d=9, n is 10125, not a 4-digit number.

There are 7 4-digit numbers such that removing the thousands digit gives 1/9 of the number.

8 0
2 years ago
How do you convert 8 yards and 6 yards to inches please show how you got your answer
d1i1m1o1n [39]
1 yard equals 36 inch therefore 6 yard will be 36x6 and 8 yard 36x8
6 0
4 years ago
Read 2 more answers
2.4z+1.2z-6.5=0.7 I don't get it
almond37 [142]
Basically that answer is incorrect. If you'd learn about combining, multiplying, dividing or subtracting like terms, this will be a simple problem. To be specific, like term is a number with a letter with it.

For example, 2.4z is a like term.

so you can only add like term, not any other normal number. When two terms have the same "letter", you will have to do what the sign said so in the problem....

2.4z + 1.2z - 6.5 = 0.7
3.6z - 6.5 = 0.7 (Add but leave the z alone because you are not multiplying)

The final answer is 3.6z - 6.5 because you cannot do anything else to that problem.

3.6z-6.5=0.7 is not true.
3 0
3 years ago
Please be quick! I need this as soon as possible!
victus00 [196]

Answer:

hhi

Step-by-step explanation:

ggggcycuhckshac

8 0
3 years ago
Read 2 more answers
Write the sentence as an equation. 373 plus the product of 169 and u is t Type a slash ( / ) if you want to use a division sign.
Masja [62]
373 + (169 * u ) = t

The equation above is your answer.

Just remember "product" means the answer to a division problem and "is" usually means that you should insert an equals sign.
5 0
3 years ago
Other questions:
  • I NEED HELP PLEASEEEEEEEEEEEEEEEEEEEEEEEEE
    8·1 answer
  • Brianna practices the piano 30 minutes each day what is the expression for the number of hours she practices in d days
    8·2 answers
  • Helpppppppppp meeeeeeee
    12·2 answers
  • The formula for the circumference of a circle is c=pi r where r is the radius and c is the circumference. The equation solved fo
    9·1 answer
  • HELP WILL MARK BRAINLIEST FOR CORRECT.
    5·1 answer
  • Janice has car insurance that she must pay four times a year. If each payment is $156, how much money should she set aside each
    6·2 answers
  • Glenda has a fish tank with 31 fish there are 3 more blue fish than green fish how many blue fish in the tank
    11·1 answer
  • Multiply
    11·1 answer
  • Factorize,<br>m<br><img src="https://tex.z-dn.net/?f=%20%7Bm%20%7D%5E%7B2%7D%20%20-%2040%20%2B%206m" id="TexFormula1" title=" {m
    7·1 answer
  • What is d = square root (0 - 2) ² - (-2 - 5)²​
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!