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nevsk [136]
3 years ago
14

Help solve this matrix problem for -4a+2b=

Mathematics
1 answer:
dlinn [17]3 years ago
6 0

Step-by-step explanation:

A = \begin{bmatrix} - 3 & 1\\ - 6 & 9\end{bmatrix} \: and \: B = \begin{bmatrix}  - 4 & - 3 \\ - 9 & 9\end{bmatrix} \\\\-4A+2B = - 4\begin{bmatrix} - 3 & 1\\ - 6 & 9\end{bmatrix} + 2\begin{bmatrix}  - 4 & - 3 \\ - 9 & 9\end{bmatrix} \\\\-4A+2B = \begin{bmatrix} - 3(-4) & 1(-4)\\ - 6(-4)& 9(-4)\end{bmatrix} + \begin{bmatrix}  - 4(2) & - 3(2) \\ - 9(2) & 9(2)\end{bmatrix} \\\\-4A+2B = \begin{bmatrix}12 & -4\\ 24& -36\end{bmatrix} + \begin{bmatrix}  - 8 & - 6 \\ - 18 & 18 \end{bmatrix} \\\\-4A+2B = \begin{bmatrix}12+(-8) & -4+(-6)\\ 24+(-18)& -36+18\end{bmatrix} \\\\-4A+2B = \begin{bmatrix}12-8 & -4-6\\ 24-18 & -36+18\end{bmatrix} \\\\\huge\red{-4A+2B }= \orange {\begin{bmatrix}4 & -10\\ 6 & -18\end{bmatrix}} \\

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Step-by-step explanation:

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4 years ago
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A 5-foot peice of ribbon cost 13.20 dollars. WHAT is the price per inch
Katen [24]

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$0.22 per inch

Step-by-step explanation:

$13.20/5 feet =

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5 0
3 years ago
Supongamos que estás en el infierno y el diablo te reta a un juego. Él piensa en un número natural.Cada día, tú tendrás una opor
Blababa [14]

Answer:

En síntesis, se inicia con el número natural más pequeño en el primer y se prosigue con los números siguientes en caso de no dar con n, de modo que el participante pasará en el infierno únicamente n días, algo pequeño en comparación con la eternidad.

Step-by-step explanation:

Los números naturales comprenden el subconjunto más pequeño de los números reales conformado por los siguientes elementos:

\mathbb{N} = \{1,2,3,4,...\}

Sea n \in \mathbb{N} el número que tiene el diablo en su mente, tal que n \geq 1. Comenzamos el primer día con 1, si este no corresponde con n. Entonces se utiliza 2 al día siguiente y este no corresponde, se emplea al día siguiente y así sucesivamente hasta conseguir n.

En síntesis, se inicia con el número natural más pequeño en el primer y se prosigue con los números siguientes en caso de no dar con n, de modo que el participante pasará en el infierno únicamente n días, algo pequeño en comparación con la eternidad.

6 0
3 years ago
1. For each of the following, indicate whether it is a question that involves permutations, combinations, or neither, and then a
krek1111 [17]

Answer:

Step-by-step explanation:

we are given some scenerios and we are to find out the total number of ways after mentioning permutations, combinations, or neither

a. How many ways can a coach choose two co-captains from 16 players in the basketball team?

Combination because both are having same position so order does not matter

16C2 = 120

b. In how many ways can seven questions out of ten be chosen on an examination?

Combinations because order of question does not matter.

10C7 = 10C3 = 120

c. Find the number of ways that 10 women in the finals of the skateboard street competition can finish first, second, and third in the X Games final.

Here order matters.  Hence permutation

10P3 = 720

d. A postal zip code contains five digits. How many different zip codes can be made with the digits 0–9? Assume a digit can be repeated.

Here repitition is allowed.  So neither permutation nor combination.

No of ways = 10^5

8 0
3 years ago
The measures of the angles of a quadrilateral in degrees are 70, 95, and 136. Determine the measure of the missing angle.
marissa [1.9K]

Answer:

let missing Angle be x

x+70+95+136=360 sum of interior angle of quadrilateral is 360

x+301=360

x=360-301=59°

<em><u>therefore</u></em><em><u> </u></em><em><u>the measure of the missing </u></em><em><u>angle</u></em><em><u> </u></em><em><u>is</u></em><em><u> </u></em><em><u>5</u></em><em><u>9</u></em><em><u>°</u></em>

4 0
3 years ago
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