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inysia [295]
2 years ago
15

In a 24 marathon, solve the 24 puzzle given by the poster above you, and post a new 24 puzzle of your own!

Mathematics
2 answers:
Black_prince [1.1K]2 years ago
7 0
1234567891011121314151617181920
12345 [234]2 years ago
4 0

Answer:

At Less In Number 20

Step-by-step explanation:

1234567891011121314151617181920

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As a result of a transfer from one school to another, a boy has to walk one
Softa [21]

Answer:

Let the distance of school and house is x k m

Then time taken at speed 2.5 km\hr=

2.5

x

hr

And time taken at speed 4 km\hr=

4

x

hr

∴

2.5

x

−

4

x

=

60

12

⇒

10

4x−2.5x

=

5

1

⇒x=3 km

Then the distance of school and house is 3 k m

may this help you

6 0
3 years ago
A) The equilibrium prices P1 and P2 for two goods satisfy the equations:
Allisa [31]

The value of P1 and P2 using the inverse matrix is 5 and 6 respectively.

<h3 />

The equilibrium prices of the three independent commodities using the inverse matrix are P1 = 4, P2 = 7, P3 = 8 respectively.

<h3>What is a matrix?</h3>

A matrix can be defined as a collection of integers(numbers that are either positive or negative) that are organized in rows and columns to construct a rectangular array. The numbers in this matrix system are referred to as elements.

To determine the values of P1 and P2 for the system of equations given by using an inverse matrix, we have:

a)

9P1 + P2 = 51

3P1 +4P2 = 39

Representing the above data in matrix form, we have:

\left[\begin{array}{cc}9&1\\3&4\\ \end{array}\right] \left[\begin{array}{c} \mathbf{P_1} \\ \mathbf{P_2}\\ \end{array}\right] =  \left[\begin{array}{c} \mathbf{51} \\ \mathbf{39} \\ \end{array}\right] which is in the form AX = B

  • In order for us to determine the values of P1 and P2, Let take the inverse of A⁻¹ on both sides of the AX= B, we have:

\mathbf{{A^{-1} AX} = A^{-1} B}

X = A⁻¹ B

Let's start by finding A⁻¹;

\mathbf{A = \left[\begin{array}{cc}9&1\\3&4\end{array}\right] }

\mathbf{A^{-1} = \dfrac{1}{36-3}\left[\begin{array}{cc}4&-1\\3&9\end{array}\right] }

\mathbf{A^{-1} = \dfrac{1}{33}\left[\begin{array}{cc}4&-1\\3&9\end{array}\right] }

Now, Let's Find A⁻¹B;

\mathbf{A^{-1}B = \dfrac{1}{33}\left[\begin{array}{cc}4&-1\\3&9\end{array}\right] \left[\begin{array}{c}51\\39\\ \end{array}\right] }

\mathbf{\implies \dfrac{1}{33}\left[\begin{array}{cc}204&-39\\-153&+351\end{array}\right]  }

\mathbf{\implies \left[\begin{array}{c}\dfrac{165}{33}\\ \\ \dfrac{198}{33}\end{array}\right]  }

\mathbf{\implies \left[\begin{array}{c}5\\ \\ 6\end{array}\right]  }

\left[\begin{array}{c}\mathbf{P_1}\\  \mathbf{P_2}\end{array}\right]= \left[\begin{array}{c}5\\ 6 \end{array}\right] }

Therefore, we can conclude that the value of P1 and P2 using the inverse matrix is 5 and 6 respectively.

b)

To determine the equilibrium prices of the three independent commodities using the inverse matrix, we have:

P₁ + 2P₂ + 3P₃ = 42

2P₁ + P₂ + 4P₃ = 47

P₁ + 3P₂ + 4P₃ = 57

The matrix in AX = B form is computed as:

\implies\left[ \begin{array}{ccc}1&2&3\\2&1&4\\1&3&4\end{array}\right] \left[\begin{array}{c}P_1\\P_2\\P_3  \end{array}\right] = \left[\begin{array}{c}42\\47\\ 57\end{array}\right]

\mathbf{A^{-1} = \dfrac{1}{|A|} \  (adj \  A)}

\mathbf{A^{-1} = \dfrac{1}{1(4-12) -2(8-4) +3(6-1)} \left[\begin{array}{ccc}-8&4&5\\1&1&-1\\5&2&-3\end{array}\right] }^1

\mathbf{A^{-1}B = -1 \left[\begin{array}{ccc}-8&1&5\\-4&1&2\\5&2&-3\end{array}\right] }\left[\begin{array}{c}42\\47\\57\end{array}\right]

\mathbf{A^{-1}B = -\left[\begin{array}{ccc}-336&+47&+285\\-168&+47&+114\\210&-47&-171\end{array}\right] }

\mathbf{A^{-1}B = -\left[\begin{array}{c}-4\\-7\\-8\end{array}\right] }

\mathbf{A^{-1}B = \left[\begin{array}{c}4\\7\\8\end{array}\right] }

Therefore, we can conclude that the values of P1 = 4, P2 = 7, P3 = 8 respectively.

Learn more about matrix here:

brainly.com/question/1821869

3 0
2 years ago
Keith bought a bag of parsnips that weighed 5 pounds. he also bought a bad of turnips that weighed 2 1/2 times as much as the pa
Illusion [34]

Answer:

5 x 2 1/2

l

l

l

V

5/1 x 5/2 = 25/2

5 0
3 years ago
Why did the lady not get arrested after she shot, drowned, and hanged her family?
Dvinal [7]

Answer:

how is this a math question? ;-;

7 0
3 years ago
Read 2 more answers
Ethan is 40 years old. His son is 12 years old. How many years ago was Ethan 5 times older than his son?
ella [17]
X=number of years that Ethas was 5 times older than his son.
we suggest this equation:

40-x=5(12-x)
40-x=60-5x
-x+5x=60-40
4x=20
x=20/4=5

answer. 5 years. 

8 0
4 years ago
Read 2 more answers
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