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
Schach [20]
2 years ago
7

Please help me with this.

Mathematics
1 answer:
OLga [1]2 years ago
8 0

Swapping rows alters the sign of the determinant:

\begin{vmatrix} x & y & z \\ -8 & 2 & -12 \\ u & v & w \end{vmatrix} = - \begin{vmatrix} x & y & z \\ u & v & w \\ -8 & 2 & -12 \end{vmatrix}

Multiplying a single row by a scalar scales the determinant by the same amount:

\begin{vmatrix} x & y & z \\ u & v & w \\ -8 & 2 & -12 \end{vmatrix} = -2 \begin{vmatrix} x & y & z \\ u & v & w \\ 4 & -1 & 6 \end{vmatrix}

Then

\begin{vmatrix} x & y & z \\ -8 & 2 & -12 \\ u & v & w \end{vmatrix} = -(-2) \begin{vmatrix} x & y & z \\ u & v & w \\ 4 & -1 & 6 \end{vmatrix} = 2\times(-6) = \boxed{-12}

You might be interested in
If ab = a, then b = <br><br> A) 0 <br> B) 1 <br> C) a <br> D) even
Zanzabum

Answer:

1

Step-by-step explanation:

because a number multiplied with 1 is equal to itself

8 0
3 years ago
Ok, I would really like some help ^.^ If you could and have the time...would you mind breaking down the answer for me please, he
uysha [10]

Answer:

C

Step-by-step explanation:

4 x 4=16 and half of 4 is 2 so the answer is C)4

5 0
3 years ago
Read 2 more answers
Fire disturbance of terrestrial biomes is one of the primary factors in non-native plant species growth. A 2014 study by Pec and
Amiraneli [1.4K]

Answer:

Step-by-step explanation:

answer is attached below

7 0
3 years ago
Read 2 more answers
Are these questions biased or not???​
o-na [289]

Answer:

No.

Step-by-step explanation:

Biased means extremely on one side, so no, the questions are not biased.

3 0
3 years ago
Read 2 more answers
Explain why there are infinitely many solutions to the equation<br> sin X = 1/2
Soloha48 [4]

Answer:

Well, everything can be turned into a half.

Step-by-step explanation:

7 0
3 years ago
Other questions:
  • Simplify the expression. 4(-8x + 5) – (-33x – 26)
    14·2 answers
  • Which equation represents the relationship between x and y in the table below?
    9·1 answer
  • [Pre-Calc]
    13·1 answer
  • Question 2<br> When writing music, musicians write the music on<br> paper instead of notebook paper.
    5·2 answers
  • 2 times 4 squared................
    8·2 answers
  • Dustin had five outstanding checks that totaled $117.54. What should his check register balance be if he had an ending balance o
    6·1 answer
  • PLEASE HELP FAST
    15·1 answer
  • Change y=e^(-x^2) to x=
    14·1 answer
  • WRITE USING ALGEBRA
    11·1 answer
  • What is the solution to the linear equation? 6k 10. 5 = 3k 12 k = 0. 5 k = 2 k = 7. 3 k = 9.
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!