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1 year ago

HELP ME PLS MY FREINDS PLS THIS IS MY LAST CHANCE FOR THIS TEST PLS HELP Classify the angle according to its measure.

Mathematics

1 answer:

Darina [25.2K]1 year ago

4 0

The answer is C Right angle

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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

2 years ago

Read 2 more answers

How is the graph of y=2(3)^x+1 translated from the graph of y = 2(3)^x

umka2103 [35]

y=2(3)x+1

−

y=2(3)x

y-y=2(3)x+1−2(3)x

the answer would be 0=1

but if it is asking u if it is false or true it is

0=1 is false, therefore the system of equations has no solutions

7 0

3 years ago

What kind of angles are they

Yuliya22 [10]

Answer:

Alternate Interior Angles

Step-by-step explanation:

The angles are on opposite sides of the transversal and are in between the parallel lines. This means they are alternate Interior Angles. Additionally, this means they are congruent, so 15x=12x+15, which gives us x=5, and the measurements of the angles are 75° each.

3 0

2 years ago

PLEASE NO LINKS and make sure it's correct.

adell [148]

Answer:

exact answer is the right word dude

4 0

2 years ago

Help, write equation for graph

Crazy boy [7]

Answer:

f(x)=(x-1)^2 -4

Step-by-step explanation:

use vertex form

4 0

3 years ago

HELP ME PLS MY FREINDS PLS THIS IS MY LAST CHANCE FOR THIS TEST PLS HELP Classify the angle according to its measure.​

HELP ME PLS MY FREINDS PLS THIS IS MY LAST CHANCE FOR THIS TEST PLS HELP Classify the angle according to its measure.