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Akimi4 [234]
3 years ago
12

Given the following matrices, find 3A - 2B. (Hint: find 3A and 2B first and then subtract.)

Mathematics
1 answer:
nikklg [1K]3 years ago
3 0
A=  \left[\begin{array}{cc}1&3\\5&2\end{array}\right] 
\\
\\3A=\left[\begin{array}{cc}3&9\\15&6\end{array}\right] 
\\
\\B=  \left[\begin{array}{cc}4&9\\0&3\end{array}\right] 
\\
\\2B=  \left[\begin{array}{cc}8&18\\0&6\end{array}\right] 
\\
\\3A-2B=\left[\begin{array}{cc}3&9\\15&6\end{array}\right]- \left[\begin{array}{cc}8&18\\0&6\end{array}\right]=\left[\begin{array}{cc}3-8&9-18\\15-0&6-6\end{array}\right]=
\\
\\=\left[\begin{array}{cc}-5&-9\\15&0\end{array}\right]
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Brilliant_brown [7]

Answer:

x = -5, 2

Step-by-step explanation:

The first step to factor the equation is removing any factors/like terms that all of the variables share.

In the equation y = 2x^2+6x-20, all numbers are multiples of 2, therefore you can factor out 2 from to equation

y = 2(\frac{2x^2}{2} + \frac{6x}{2} -\frac{20}{2})

y = 2(x^2+3x-10)

Next, you can factor the equation in the parenthesis. Since x^2 is not multiplied by anything, you know that the factors of x^2 must be x and x. Therefore, the two factors of -10 must add up to 3. The only two factors of -10/x that add up to 3 are 5 * -2.

The factors of the equation are then (2)(x+5)(x-2)

Lastly, set up only the factors containing a x to 0 in order to solve for x-intercept.

x+5 = 0; x= 0-5 ; x = -5

x - 2 = 0; x = 0 + 2; x = 2

7 0
3 years ago
At a hockey game, a vender sold a combined total of 216 sodas and hot dogs. The number of sodas sold was two times the number of
ankoles [38]

Answer:

72 hot dogs 144 sodas

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4 0
3 years ago
What is the effect of the graph of the function f(x)=x^2 when f(x) is changed to f(x+8)?​
sashaice [31]

Answer:

Step-by-step explanation:

graph is translated left by 8 units

8 0
3 years ago
What is 5^3x6/24(64+42) <br> I am bad at these kind of math problems XD
ankoles [38]
PEMDAS 

P 106
5^6/24X106

E  125
125X6/24X106

M 750/2544

D 3.392

A

S
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3 years ago
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1 - 4
-3
7 0
3 years ago
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