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]
3 years ago
15

Zane performs the elementary row operation represented by R2-½R1 on matrix A.​

Mathematics
2 answers:
UkoKoshka [18]3 years ago
5 0

Answer:

[2 5 0]

[-7 -11/2 12]

Step-by-step explanation:

We want to perform elementary row operation represented by R2 - ½R1 on matrix A in the figure attached.

Now, matrix A is given as;

[2 5 0]

[-6 -3 12]

Now, R1 is row 1 = [2 5 0]

R2 is row 2 = [-6 -3 12]

Thus, R2 - ½R1 = [-6 -3 12] - ½[2 5 0]

This gives;

[-6 -3 12] - [1 5/2 0] = [-7 -11/2 12]

Now,[-7 -11/2 12] will be the new row 2 since it's just an elementary row operation we did on the Matrix A.

Thus, the new matrix is now;

[2 5 0]

[-7 -11/2 12]

Anastaziya [24]3 years ago
3 0

Answer:

Its actually,

−7   −11/2   12

−6    −3     12

I just took the quiz :)

You might be interested in
Change to standard form. Please help, ty! Will mark brainliest!
soldier1979 [14.2K]

Step-by-step explanation:

6. 7x + 7y = -11

7. -1x + 8y = 12

8. 9x + 11y = -7

7 0
3 years ago
What does x=??? hurry!!
elena-s [515]

Answer:

17 degrees.

There is a right angle and we know that is 90 degrees. 73 degrees has a vertical angle which is 73 degrees. The opposite vertical angle adds up to another angle which gives you 90. Subtract 73 from 90 and you get 17.

4 0
3 years ago
What number is 62% of 50
goldfiish [28.3K]
62\% \ of \ 50= 62\% \times 50=\frac{62}{100} \times 50= \frac{62}{2} \times 1=31

31 is 62% of 50.
8 0
3 years ago
HELP ME PLS NEED IT QOUIKC
nexus9112 [7]

Answer: 7.08 cm2

Step-by-step explanation:

6 0
3 years ago
4x square+ 8 x - 5=0<br><img src="https://tex.z-dn.net/?f=4%20%7Bx%7D%5E%7B2%7D%20%20%2B%208x%20-%205%20%3D%200" id="TexFormula1
Damm [24]

Answer:

x = \frac{1}{2}

x = -\frac{5}{2}

Step-by-step explanation:

Solve Using the Quadratic Formula

     4x^2 + 8x − 5 = 0

Use the quadratic formula to find the solutions.

    −b ± √b^2 − 4 (ac)

     -------------------------

               2a

Substitute the values a = 4, b = 8, and c = −5 into the quadratic formula and solve for x.

    −8 ± √82 − 4 ⋅ (4 ⋅ −5)

     -------------------------

              2 ⋅ 4

Simplify the numerator.

Raise 8 to the p ower of 2.

     −8 ± √64 − 4 ⋅ 4 ⋅ −5

x=     ---------------------------

               2 ⋅ 4

Multiply −4 by 4.

        −8 ± √64 − 16 ⋅ −5

x =       -------------------------

                2 ⋅ 4

Multiply −16 by −5.

        −8 ± √64 + 80

x =       -------------------

               2 ⋅ 4

Add 64 and 80.

        −8 ± √144

x =        --------------

             2 ⋅ 4

Rewrite 144 as 12^2.

        −8 ± √122

x =       ------------

            2 ⋅ 4

Pull terms out from under the radical, assuming positive real numbers.

multiply 2 by 4          

        −8 ± 12

x=     ------------

            8

simplify

    −2 ± 3

x=   ---------

        2

The final answer is the combination of both solutions.

x= 1/2, -5/2

Hope this helped!

6 0
3 years ago
Read 2 more answers
Other questions:
  • anisha invested $8,000 in an account that earns 10% interest. How much money will she have in 15 years if the interest is compou
    5·1 answer
  • I need help on this math problem.
    15·1 answer
  • Need help with this second part of math
    13·1 answer
  • What is the mean of 10,12,15,11
    5·2 answers
  • Perpendicular Bisectors I'm confused on what to do here
    5·1 answer
  • What is m 41 167 117 111
    6·1 answer
  • I will give brainiest to whoever answers correctly !!
    15·1 answer
  • A bag contains colored tiles. This week Andres will practice with his band for 1 hours on Monday,1 hours on Tuesday, and 2 hours
    7·1 answer
  • Multiply 2/3 by 42,and then multiply that product by 10​<br><br> Need to see the steps.
    10·1 answer
  • What are two different ways you could find the value of a? Explain these methods.
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!