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
andreyandreev [35.5K]
3 years ago
9

The size of matrices a and b are given. Find the sizes of ab and ba whenever they are defined. (if an answer does not exist, ent

er dne.) a is of size 6 ✕ 7, and b is of size 7 ✕ 8.
Mathematics
1 answer:
Julli [10]3 years ago
7 0

We have been given two matrices a and b. A has 6 rows and 7 columns, while b has 7 rows and 8 columns.

Since we know that order matters in matrix multiplication. In order for matrix multiplication to be defined number of columns in the first matrix should be equal to the number of rows of in the second matrix.

We can see that number of columns in matrix a and number of rows in matrix b is 7.

Therefore, size of ab will be equal to number of rows of matrix a and number of columns of matrix b that is 6 by 8.

Now we will see whether ba is defined or not. We can see columns in matrix b are 8 and rows in matrix a are 6, which is not equal. So we can say that ba is not defined.

Therefore, size of ba is not defined (dne).


You might be interested in
Mia works at a smoothie shop. For h hours of work, Mia earns 8h dollars. Last weekend, Mia worked 9 hours.
anastassius [24]

Answer:

72$

Step-by-step explanation:

8h

h=9

8*9=72$

8 0
3 years ago
Order the group of parabolas from widest to narrowest.
Mamont248 [21]

Answer:

\large\boxed{y=\dfrac{1}{4}x^2,\ y=-\dfrac{1}{2}x^2,\ y=\dfrac{3}{2}x^2}

Step-by-step explanation:

The equation of a parabola: y = ax²

The larger the value of |a|, the narrower the parabola.

We have the following coefficients a:

\left|\dfrac{1}{4}\right|=\dfrac{1}{4},\ \left|-\dfrac{1}{2}\right|=\dfrac{1}{2},\ \left|\dfrac{3}{2}\right|=\dfrac{3}{2},

We arrange the coefficients from the smallest to the largest:

\dfrac{1}{4}\

Therefore you have the answer:

y=\dfrac{1}{4}x^2,\ y=-\dfrac{1}{2}x^2,\ y=\dfrac{3}{2}x^2

6 0
3 years ago
Explain how you know if a system of equations has one solution, no solutions, or infinitely many solutions. Write your answers (
Nataliya [291]

Answer:

Written Below.

Step-by-step explanation:

A system of linear equations has one solution when the graphs intersect at a point. A system of linear equations has no solution when the graphs are parallel. A system of linear equations has infinite solutions when the graphs are the exact same line.

(This uses graphing.)

Sidenote: I hope this helps! :)

7 0
3 years ago
Use the graph below to write 5 conic section equations that create it. Use Desmos to check if your equations produce this pictur
Snezhnost [94]

Answer:

i think it would be this

3.) The Right Eye (Green Circle)  Captionless Image

hope this helps


7 0
3 years ago
Function 1: Sam is 150 feet below sea level in a cave and trying to climb back out to safety at zero elevation. He climbs at a r
prisoha [69]

Answer:

Start at -150, then add 3(-5), then add 122.2. -150 + 3(-5) + 122.2 = -45.3.

7 0
3 years ago
Read 2 more answers
Other questions:
  • The height of a box that carol is wrapping is 7 inches more than the width of the box. the length is 2 inches less than twice th
    7·1 answer
  • 3
    11·1 answer
  • Ahmed is riding the elevator in a building. The building has floors above and below ground level. Ahmed uses the expression belo
    9·2 answers
  • The perimeter of a square mirror is 88 inches. What is the length of each side of the mirror in inches?
    12·1 answer
  • Which ordered pair (c,d) is the solution to the given system of linear equations?
    14·2 answers
  • The radius of a circle with the given dimension being r=17cm
    7·1 answer
  • 1.-25 is an example of a whole numbers. True O O False​
    14·2 answers
  • Select the best equation needed to solve for x; then solve for x.
    8·2 answers
  • What is 4x - y = - 20 in y=mx+b form
    15·2 answers
  • Both passages base their arguments on the unstated
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!