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Usimov [2.4K]
3 years ago
15

Which Matrix is equal to A-2B+C

Mathematics
2 answers:
anastassius [24]3 years ago
8 0
It is convenient to use the matrix capability of your calculator to do this. The result is ...
\left[ \begin{array}{cc}-1&4\\5&-7\end{array} \right]

lawyer [7]3 years ago
5 0
\bf A=
\begin{bmatrix}
5&2\\3&0
\end{bmatrix}\qquad B=
\begin{bmatrix}
4&3\\-1&6
\end{bmatrix}\qquad C=
\begin{bmatrix}
2&8\\0&5
\end{bmatrix}\\\\
-------------------------------\\\\
2B\implies 2\begin{bmatrix}
4&3\\-1&6
\end{bmatrix}\implies \begin{bmatrix}
2\cdot 4&2\cdot 3\\2\cdot -1&2\cdot 6
\end{bmatrix}\implies 
\begin{bmatrix}
8&6\\-2&12
\end{bmatrix}

\bf \stackrel{A-2B}{\begin{bmatrix}
5&2\\3&0
\end{bmatrix}-\begin{bmatrix}
8&6\\-2&12
\end{bmatrix}}\implies 
\begin{bmatrix}
-3&-4\\5&-12
\end{bmatrix}
\\\\\\
\stackrel{A-2B+C}{\begin{bmatrix}
-3&-4\\5&-12
\end{bmatrix}+\begin{bmatrix}
2&8\\0&5
\end{bmatrix}}\implies 
\begin{bmatrix}
-1&4\\5&-7
\end{bmatrix}
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find the two angles measures from the diagram 7x+9 5x+3 there's 3 answers 1. 73 and 73 2. 107 ,107 3.107 and 73 this is so confu
viva [34]

Answer:

<h2>107 and 73</h2><h2 />

Step-by-step explanation:

supplementary angle

7x + 9 + 5x + 3 = 180

12x = 180 - 3 - 9

x = 168 / 12

x = 14

plugin x=14 into the equation

= 7x + 9

= 7(14) + 9

= 107°

plugin x=14 into the equation

= 5x + 3

= 5(14) + 3

= 73°

4 0
3 years ago
Nora and Lila are reading the same novel for book club.
stich3 [128]

Answer:

<u>1. Nora and Lila be on the same page of the book after 6 days and a half.</u>

<u>2. Nora and Lila be on the page 180.</u>

Step-by-step explanation:

1. Let's check the information given to resolve the question:

Current page of the novel that Nora is reading now = 128

Pages per day Nora reads = 8

Current page of the novel that Lila is reading now = 102

Pages per day Lila reads = 12

Days ahead for Nora and Lila will be on the same page = x

2. After how many days of reading will Nora and Lila be on the same page of the book?

128 + 8x = 102 + 12x

8x - 12x = 102 - 128 (Subtracting 12x and 128 at both sides)

-4x = -26

x = 6.5

<u>Nora and Lila be on the same page of the book after 6 days and a half.</u>

<u>3.</u> What page will they be on?

Nora : 128 + 8 (6.5) = 128 + 52 = 180

Lila : 102 + 12 (6.5) = 102 + 78 = 180

<u>Nora and Lila be on the page 180</u>

4 0
3 years ago
The sum of three numbers is 69. If the second number is equal to the first diminished by 8, and the third number is 5 times the
bonufazy [111]
X = first number
x - 8 = 2nd number
5x = 3rd number

x + x - 8 + 5x = 69
7x - 8 = 69 <=== this is the equation u would use

7x - 8 = 69
7x = 69 + 8
7x = 77
x = 11

1st number = 11
2nd number : x - 8 = 11 - 8 = 3
3rd number : 5x = 5(11) = 55
3 0
3 years ago
Read 2 more answers
A jellyfish travels 3/5 mile in 1/6 hour and a walrus travels 5/6 mile in 3/10 hour.
emmasim [6.3K]

Answer:

The jellyfish travels faster than the walrus

Step-by-step explanation:

Given data

A jellyfish travels 3/5 mile in 1/6 hour

Distance= 3/5 mile

time= 1/6 hour

speed= distance/time

speed= 3/5/1/6

speed= 3/5*6/1

speed= 18 mile per hour

a walrus travels 5/6 mile in 3/10 hour.

Distance= 5/6 mile

time= 3/10 hour.

speed= distance/time

speed= 5/6/3/10

speed= 5/6*10/3

speed= 50/18 mile per hour

3 0
3 years ago
What scale factor do you use to make<br><br> A 5mm object 100mm ?
Flauer [41]

Answer:

Utiliza una cifra que pueda ser resultado de dividir 100:5 y eso a su vez nos dará el valor que debe aumentar en la escala

7 0
2 years ago
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