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
ddd [48]
3 years ago
10

What matrix multiplication is possible ?

Mathematics
1 answer:
gizmo_the_mogwai [7]3 years ago
8 0

Answer:

Firstly, it is important to note that the multiplication of matrices is done in this way:

Columns x Rows or viceversa

Now, two matrices can be multiplied only if their dimensions are compatible, which means that the number of columns in the first matrix must be​​ equal to the number of rows in the second matrix.

In other words:

Two matrices A and B are said to be multiplies if the number of columns in A coincides with the number of rows in B.

In this context, the correct option is:

\left[\begin{array}{c}1&-1\end{array}\right] \left[\begin{array}{cc}0&4\end{array}\right]

Where A is:

\left[\begin{array}{c}1&-1\end{array}\right]

And B is:

\left[\begin{array}{cc}0&4\end{array}\right]

As you can see, the number of columns in A coincides with the number of rows in B

You might be interested in
At the bright-as-day light bulb factory, 5 out of each 136 bulbs produced are defective. If the daily production is 2720 bulbs,
lions [1.4K]

Answer:

100 lightbulbs

Step-by-step explanation:

Basically find the percentage of lightbulbs that are bad. 5/136. So about 3. 6 percent. I'm going to use a more exact form of this percent for my calculations though. Now use the decimal for of this (0.036....) and multiply it by 2720. Using my exact decimal, the answer just so happened to be exactly 100. So there will be 100 defective lightbulbs per day. (Teachers are a stickler for units, so don't forget them if it's for a teacher)

Hope this helps!

4 0
2 years ago
The equation of a circle in general form is ​ x2+y2+20x+12y+15=0 ​ . What is the equation of the circle in standard form?
mestny [16]

Answer:

(x)²+(y)²=0

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
The polynomial $f(x)$ has degree 3. If $f(-1) = 15$, $f(0)= 0$, $f(1) = -5$, and $f(2) = 12$, then what are the $x$-intercepts o
Alex_Xolod [135]

Your calculator's cubic regression function can tell you the equation is

... f(x) = 2x³ + 5x² -12x = x(x +4)(2x-3)

The x-intercepts are -4, 0, +1.5.

_____

If you want to solve this "by hand", you can first of all recognize that since there is an x-intercept at 0, the cubic will only have three coefficients. That is, you can write the equation as

... f(x) = ax³ + bx² + cx

Substituting the given points (except (0, 0)) gives three linear equations in a, b, c.

... -a +b -c = 15 . . . . . for x=-1

... a + b + c = -5 . . . . for x=1

... 8a +4b +2c = 12 . . for x=2

adding the first two equations gives 2b=10, or b=5. Now, you can reduce the system to

... a + c = -10

... 4a +c = -4

Subtracting the first of these equations from the second gives 3a=6, or a=2. That tells you c=-12 (from a+c=10).

Then your equation is

... f(x) = x(2x² +5x -12)

Factoring by any of the usual techniques, or graphing, or using the quadratic formula will tell you the zeros (x-intercepts) are as above.

_____

Since the input values are sequential, you can also develop the function from differences of the output values. Those are 15, 0, -5, 12. First differences are -15, -5, +17. Second differences are +10, +22. The third difference is 12. Using the first of these differences in appropriate places in the interpolating polynomial formula, we have

... f(x) = 15 + (x+1)(-15 + (x)/2·(10 + (x-1)/3·(12))) = 2x³ +5x² -12x . . . . as above

4 0
2 years ago
The figure above shows the probability density function for the random variable x. What is P(3≤x<7)?
qwelly [4]

The value of the probability P(3≤x<7) is 1

<h3>How to evaluate the probability expression?</h3>

The expression is given as: P(3≤x<7)

This is calculated using:

P(3 ≤ x < 7) = P(3) + P(4) + P(5) + P(6)

Using the figure of the probability density function (see attachment), we have:

P(3 ≤ x < 7) = 0.30 + 0.30 + 0.20 + 0.20

Evaluate

P(3 ≤ x < 7) = 1

Hence, the value of the expression is 1

Read more about probability density function at:

brainly.com/question/15318348

#SPJ1

4 0
1 year ago
What is the area of a square with a 80 ft. Perimeter
slega [8]

Answer:

400 sq. ft.

Step-by-step explanation:

We gotta find the length of a side:

First, we divide 80 by 4, because the perimeter of a square is (4 x side):

80 ft. / 4 = 20  ft.

Second, we doing the normal area of a square equation:

20^{2} = 400 square ft.

Which leads to out answer of 400 sq. ft.

5 0
2 years ago
Other questions:
  • How to do I do solving systems of equations by elimination
    11·1 answer
  • Between the time Iko woke up and lunchtime, the temperature rose by 11. Then by the time he went to bed, the temperature dropped
    11·1 answer
  • Cardiovascular disease is a major cause of death and illness worldwide, with high blood pressure and high LDL cholesterol both b
    9·1 answer
  • Can someone give me the answer of the question b?
    14·1 answer
  • How do I put 6.50s+2.00d=836.50 into a calculator?
    15·1 answer
  • Whats the answer for this ​
    8·1 answer
  • Have a great Early Thx-Giving<br> -Equalizer
    15·2 answers
  • BOOKMARK
    15·1 answer
  • Brainliest for correct answer
    8·1 answer
  • In the diagram, m what is m
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!