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marysya [2.9K]
2 years ago
7

If A = [

Mathematics
1 answer:
Vlada [557]2 years ago
5 0

Answer:

Hello,

Step-by-step explanation:

a)

A=\begin{bmatrix}-4 & 2 \\3 & -7 \end{bmatrix}\\\\|A|=det \ A=-4*(-7)-3*2=28-6=22\\\\

b)

Adj\ A= \begin{bmatrix}-7 & 3 \\2 & -4 \end{bmatrix}\\

c)

A^{-1}=\begin{bmatrix}\dfrac{-7}{22}  & \dfrac{2}{22}  \\\\\dfrac{3}{22}  & \dfrac{-4}{22}  \end{bmatrix}

d) Since A has an inverse, A is inversible and <u>not singular.</u>

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Is it possible to draw a triangle with numbers 5,6,11
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Answer:

No

Step-by-step explanation:

Let's use the Pythagorean Theorem. For those of you that don't know, it is a^2 + b^2 = c^2\\.  

11 is the bigger side in this case, so our formula would go like this: 5^2 + 6^2 = 11^2\\.

We now calculate to see if this is true.

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3 years ago
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3 years ago
The monthly profit for a small company that makes long-sleeve T-shirts depends on the price per shirt. If the price is too high,
Andrej [43]

Answer:

A. $18

B. $200

C. p\in (16,20)

Step-by-step explanation:

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f(p) = -50p^2 + 1,800p - 16,000

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In p=16 and p=20, the profit is 0 and when p<16 and p>20, there will be a loss.

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4 years ago
I am having a test tomorrow about this can someone help me explain it?​
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Answer:

the answer would be 217 [degrees]

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145+72=217

7 0
3 years ago
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