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
viva [34]
2 years ago
5

If a = {6 6 4 7 -4 4 -6 9 -3} and B= {1 5 -8 9 -5 -8 9 -5 2}, find 3a +9B Matrix operations

Mathematics
1 answer:
V125BC [204]2 years ago
6 0

Answer:

3A+9B=\begin{bmatrix} 27 & 63 & -60 \\\\ 102 & -57 & -60\\\\ 63 & -18 & 9 \end{bmatrix}

Step-by-step explanation

  • A=\begin{bmatrix} 6 & 6 & 4\\\\7 & -4 & 4\\\\ -6 & 9 & -3\end{bmatrix}\: and \: B=\begin{bmatrix}1 & 5 & -8\\\\ 9 & -5 & -8\\\\ 9 & -5 & 2\end{bmatrix}

  • \rightarrow 3A=3\begin{bmatrix} 6 & 6 & 4\\\\7 & -4 & 4\\\\ -6 & 9 & -3\end{bmatrix},\:  \: 9B =9\begin{bmatrix}1 & 5 & -8\\\\ 9 & -5 & -8\\\\ 9 & -5 & 2\end{bmatrix}

  • \rightarrow 3A=\begin{bmatrix} 3*6 & 3*6 & 3*4\\\\3*7 & 3(-4) & 3*4\\\\ 3(-6) & 3*9 & 3(-3)\end{bmatrix},\:\: 9B =\begin{bmatrix}9*1 &9* 5 &9( -8)\\\\ 9*9 & 9(-5) & 9(-8)\\\\ 9*9 & 9(-5) & 9*2\end{bmatrix}

  • \rightarrow 3A=\begin{bmatrix} 18 & 18 & 12 \\\\ 21 & -12 & 12\\\\ -18 & 27 & -9\end{bmatrix},\:\: 9B =\begin{bmatrix} 9 & 45 & -72 \\\\ 81 & -45 & -72\\\\ 81 & -45 & 18\end{bmatrix}

  • \rightarrow 3A+9B=\begin{bmatrix}18+9 & 18+45 & 12+(-72) \\\\ 21+81 & -12 +(-45) & 12+(-72)\\\\ -18+81 & 27+(-45) & -9+18 \end{bmatrix}

  • \rightarrow 3A+9B=\begin{bmatrix} 18+9 & 18+45 & 12-72 \\\\ 21+81 & -12 -45 & 12-72\\\\ -18+81 & 27-45 & -9+18 \end{bmatrix}

  • \rightarrow \purple{\bold{3A+9B=\begin{bmatrix} 27 & 63 & -60 \\\\ 102 & -57 & -60\\\\ 63 & -18 & 9 \end{bmatrix}}}
You might be interested in
Name the part of the circle​
Mekhanik [1.2K]

Answer:

radius

Step-by-step explanation:

i believe it is radius because in my point of view it looks like the line travels up to the half of the circle.

3 0
3 years ago
Read 2 more answers
Which one is the answer!?
never [62]
Just copy and paste the question onto an open tab in google and hit search. I just got the answer of c
6 0
3 years ago
Read 2 more answers
What is the value of x?
katovenus [111]
30+4X=90 (right angle is 90°)
X=15
4 (15)= 60
30+60= 90 so you know it's right
4 0
3 years ago
Plz help me with this
enot [183]

Answer:

27.7

Step-by-step explanation:

Pythagorean Theorem

88.3^{2} - 10.7^{2} = x^{2}  (10.7 comes from half of the 21.4 side)

x^{2} = height

3 0
3 years ago
Which expression converts 100 inches per minute to feel per minute
kakasveta [241]
<span> You only have to </span>convert inches<span> to </span>feet<span> by dividing by 12: </span>100in/min<span> (1/12 ft/in) = </span>100/12 ft/min<span> = 25/3 ft/</span>min<span>.</span>
6 0
3 years ago
Other questions:
  • when you divide a whole number by a fraction with a numerator of 1, explain how you can find the quotient
    7·1 answer
  • Choose the best estimate for the volume of a bathtub. A) 50 quarts B) 50 gallons C) 50 cups D) 50 teaspoons
    11·2 answers
  • Factor this? <br> Subtract the following polynomials. <br> (3x^2 - 5x + 12) - (5x^2 + x -11)
    9·1 answer
  • The following statement is either true​ (in all​ cases) or false​ (for at least one​ example). If​ false, construct a specific e
    12·1 answer
  • **10 POINTS PLEASE HELP**
    8·1 answer
  • My cousin borrowed $18,000 for a new car loan for 6 years. He told me that at the end of the loan, he had paid $25,560 for the i
    15·1 answer
  • Evaluate x^2-2y when x=4 and y=1
    9·1 answer
  • Jaylah has two packages of trail mix. The first package weighs 2.40 pounds and the second package weighs 3.25 pounds. She mixes
    12·1 answer
  • Volume = 154 cm cubic
    12·1 answer
  • Help ASAP
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!