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3 years ago

2 2/10 x 6 2/5 please help me!!!!! Thank you!!!

Mathematics

1 answer:

evablogger [386]3 years ago

8 0

The answer is 24/25.

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Given the matrices: 1 2 A= 1 -1 2 1 1 B= 3 4 Calculate AB: C11 C12 [2.1] х 1 2 3 4 C21 C22 C11 = C12 = -2 C22 - C215 DONE

eduard

Answer:

$\:c_{11}=-2,\:\:\:c_{12}=-2$

$\:c_{21}=5,\:\:\:c_{22}=8$

Step-by-step explanation:

Given the matrices

$A=\begin{pmatrix}1&-1\\ 2&1\end{pmatrix}$

$B=\begin{pmatrix}1&2\\ \:3&4\end{pmatrix}$

Calculating AB:

$\begin{pmatrix}1&-1\\ \:\:2&1\end{pmatrix}\times \:\begin{pmatrix}1&2\\ \:\:3&4\end{pmatrix}=\begin{pmatrix}c_{11}&c_{12}\\ \:\:\:c_{21}&c_{22}\end{pmatrix}$

Multiply the rows of the first matrix by the columns of the second matrix

$=\begin{pmatrix}1\cdot \:1+\left(-1\right)\cdot \:3&1\cdot \:2+\left(-1\right)\cdot \:4\\ 2\cdot \:1+1\cdot \:3&2\cdot \:2+1\cdot \:4\end{pmatrix}$

$=\begin{pmatrix}-2&-2\\ 5&8\end{pmatrix}$

Hence,

$\begin{pmatrix}c_{11}&c_{12}\\ \:\:\:c_{21}&c_{22}\end{pmatrix}=\begin{pmatrix}-2&-2\\ \:5&8\end{pmatrix}$

Therefore,

$\:c_{11}=-2,\:\:\:c_{12}=-2$

$\:c_{21}=5,\:\:\:c_{22}=8$

5 0

3 years ago

Read 2 more answers

Heather has 2 less than 5 times the amount of shoes that Donna has. Gina has 1 more than 2 time

gogolik [260]

Answer:

a. (5x-2)-(2x+1)

b. 3x-3

c.39

Step-by-step explanation:

8 0

3 years ago

What is the x-intercept of the line with this equation? <br><br>−5x + <img src="https://tex.z-dn.net/?f=%5Cfrac%7B1%7D%7B5%7D" i

Sonja [21]

The x-intercept is the point on the graph where it crosses the x-axis. It’s also the value of the x-coordinate when y = 0.

To find the x-intercept, set y = 0:

-5x + 1/5(0) = 15

-5x + 0 = 15
-5x = 15

Divide both sides by -5:

x = -3.

Therefore, the x-intercept is (-3, 0).

Please mark my answers as the Brainliest if your find my explanations helpful :)

7 0

2 years ago

(PLEASE HELP!!! THIS IS TIMED!! I WILL MARK THE BRAINIEST IF YOUR ANSWER IS CORRECT!!!)

konstantin123 [22]

Answer:

y=3x-1

Step-by-step explanation:

7 0

3 years ago

Read 2 more answers

What are the slope and the y-intercept of the linear function that is represented by the equation y - 9x-27?

kakasveta [241]

Answer:

the slope and the y-intercept of the linear function that is represented by the equation y = 9 x minus 27? The slope is –2, and the y-intercept is 9.

Step-by-step explanation:

hope this helps

6 0

3 years ago