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
notsponge [240]
3 years ago
5

Find two different 2 by 2 matrices a and b such that ab=ba

Mathematics
1 answer:
stiv31 [10]3 years ago
8 0
Let \mathbf A=\mathbf I be the identity matrix. Then pick whatever matrix you like for \mathbf B.
You might be interested in
Write 0.132 as a number
Luden [163]
0.132 written in lowercase:

one hundred thirty-two thousandths


zero point one hundred thirty-two

or, even simpler:

zero point one three two

4 0
2 years ago
Read 2 more answers
What is 1/5 expressed as a percent
coldgirl [10]
1/5 x 100 = 20%


Answer: 20%
4 0
3 years ago
Read 2 more answers
George has $49 which he decides to spend on x and y. commodity x costs $5 per unit and commodity y costs $11 per unit. he has th
FromTheMoon [43]

We are given the equations:

<span>5 x + 11 y = 49                    --> eqtn 1</span>

<span>u = 3 x^2 + 6 y^2               --> eqtn 2</span>

 

Rewrite eqtn 1 explicit to y:

11 y = 49 – 5 x

<span>y = (49 – 5x) / 11               --> eqtn 3</span>

 

Substitute eqtn 3 to eqtn 2:

u = 3 x^2 + 6 [(49 – 5x) / 11]^2

u = 3 x^2 + 6 [(2401 – 490 x + 25 x^2) / 121]

u = 3 x^2 + 14406/121 – 2940x/121 + 150x^2/121

u = 4.24 x^2 – 24.3 x + 119.06

Derive then set du/dx = 0 to get the maxima:

du/dx = 8.48 x – 24.3 = 0

solving for x:

8.48 x = 24.3

x = 2.87

 

so y is:

y = (49 – 5x) / 11 = (49 – 5*2.87) / 11

y = 3.15

 

Answer:

<span>George will choose some of each commodity but more y than x.</span>

7 0
3 years ago
Can someone help me with this.. It is timed I WILL MARK YOU AS BRAINLIEST
DENIUS [597]
(2p+13)(p−3)/2p-7
​​
3 0
3 years ago
Read 2 more answers
Please help me with precalculus??<br>linear and angular speed
Anit [1.1K]
13)

there are 2π radians in 1 revolution, and there are 60 seconds in 1 minute, so keeping that in mind, then,

\bf \cfrac{4\underline{\pi} }{5~\underline{s}}\cdot \cfrac{rev}{2\underline{\pi} }\cdot \cfrac{60~\underline{s}}{min}\implies \cfrac{4\cdot 60~rev}{5\cdot 2~min}\implies \cfrac{240~rev}{10~min}\implies 24\frac{rev}{min}

14)

 \bf \textit{linear velocity}\\\\&#10;v=rw\quad &#10;\begin{cases}&#10;r=radius\\&#10;w=angular~speed\\&#10;----------\\&#10;v=32\frac{m}{sec}\\&#10;w=100\frac{rev}{min}&#10;\end{cases}\\\\&#10;-------------------------------\\\\&#10;\textit{let's convert \underline{w} to }\frac{radians}{sec}

\bf \cfrac{100~\underline{rev}}{\underline{min}}\cdot \cfrac{2\pi }{\underline{rev}}\cdot \cfrac{\underline{min}}{60~sec}\implies \cfrac{100\cdot 2\pi }{60~sec}\implies \cfrac{10\pi }{3~sec}\implies \cfrac{10\pi }{3}\frac{radians}{sec}\\\\&#10;-------------------------------\\\\&#10;v=rw\implies \cfrac{v}{w}=r\implies \cfrac{\frac{30~m}{sec}}{\frac{10\pi }{3~sec}}\implies r=\cfrac{30~m}{\underline{sec}}\cdot \cfrac{3~\underline{sec}}{10\pi }&#10;\\\\\\&#10;r=\cfrac{90}{10\pi }m

15)

what is the radians per seconds "w" in revolutions per minute?  just another conversion like in 13)

\bf \cfrac{\underline{\pi} }{3~\underline{sec}}\cdot \cfrac{rev}{2\underline{\pi }}\cdot \cfrac{60~\underline{sec}}{min}\implies \cfrac{60 ~rev}{3\cdot 2 ~min}\implies \cfrac{60 ~rev}{6 ~min}\implies 10\frac{rev}{min}
4 0
3 years ago
Other questions:
  • Wich of following is(are) the solution(s) to |x+3| = 12<br> Answer: x=9
    5·2 answers
  • Someone help me please :)
    9·2 answers
  • What is 8,000 *20? Please help me, thanks!
    5·2 answers
  • What is the slope of the line that goes through (-5,-5) and (5,-7)?
    12·2 answers
  • Enter the mixed number as an improper fraction. 1 5/6 =
    14·2 answers
  • Given Event A, Event B, and Event C. Event A and Event B are mutually exclusive. Event A and Event C are not mutually exclusive.
    9·1 answer
  • 2. Jon has $45.00. He plans to spend 4/5 of his money on sports
    5·2 answers
  • Self explanatory solve porfavor
    5·1 answer
  • Slope of (0,1) and (4,3)
    9·2 answers
  • The amount of money earned varies directly as the number of hours worked. After working 14 hours, Joe earned $119. How
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!