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aivan3 [116]
2 years ago
13

I FREAKING NEED HELPPP!!!

Mathematics
1 answer:
Ratling [72]2 years ago
5 0

Answer:

\boxed{\begin{bmatrix}  3 &  - 1 \\  - 3 & 4\end{bmatrix}  = 12 - 3 =  \boxed{9} }\\ \\  \boxed{\begin{bmatrix}   -12 &  - 1 \\  12 &  5\end{bmatrix}  =  - 60-  ( - 12) =  \boxed{ - 48}} \\  \\ \boxed{\begin{bmatrix}  0&  - 1 \\  17 & 4\end{bmatrix}  = 0 -( - 17 )=  \boxed{17}} \\  \\\boxed{ \begin{bmatrix}  8&  - 1 \\  -  4 &  - 1\end{bmatrix}  =  - 8 - 4 =  \boxed{ - 12} }\\  \\ \boxed{\begin{bmatrix}  2 &  - 1 \\  2 &  - 1\end{bmatrix}  =  - 2 - ( - 2) =  \boxed{0}} \\  \\ \boxed{ \begin{bmatrix}  1 &  0\\  0 &1\end{bmatrix}  = 1 - 0 =  \boxed{1}}

Step-by-step explanation:

the \: determinant \: of  \: a \: matrix : A  \to\\If  \: A  =\begin{bmatrix}  x & y \\ a & b \end{bmatrix} \: then : \\  its \: determinant \: is \: givn \: by \to \\  |A|  =  (b \times x) - (a \times y) \\  \boxed{|A|  = bx - ax}

♨Rage♨

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Suppose a room is 5.2 m long by 4.3m wide and 2.9 m high and has an air conditioner that exchanges air at a rate of 1200 L/min.
Readme [11.4K]

Answer:

54 minutes

Step-by-step explanation:

From the question, we are given;

  • A room with dimensions 5.2 m by 4.3 m by 2.9 m
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We are required to determine the time taken to exchange the air in the room;

First we are going to determine the volume of the room;

Volume of the room = length × width × height

                                  = 5.2 m × 4.3 m × 2.9 m

                                  = 64.844 m³

Then we should know, that 1 m³ = 1000 L

Therefore, we can convert the volume of the room into L

= 64.844 m³ × 1000 L

= 64,844 L

But, the rate is 1200 L/min

Thus, time = Volume ÷ rate

                  = 64,844 L ÷ 1200 L/min

                   = 54.0367 minutes

                   = 54 minutes

Therefore, it would take approximately 54 minutes

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Step-by-step explanation:

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