Answer:
-18 + 6j
Step-by-step explanation:
3 * -6 is -18
3 * 2j is 6j
Answer:
one because x represent 1
The first equation tells you that writing "y" is the same as writing "4x-1".
So, in the second equation, you can substitute "y" with "4x-1":
![y=2x-5\mapsto 4x-1=2x-5 \iff 2x=-4 \iff x=-2](https://tex.z-dn.net/?f=y%3D2x-5%5Cmapsto%204x-1%3D2x-5%20%5Ciff%202x%3D-4%20%5Ciff%20x%3D-2)
Now that we have the value for x, we can deduce the value of y:
![y=2x-5 = 2(-2)-5 = -4-5 = -9](https://tex.z-dn.net/?f=y%3D2x-5%20%3D%202%28-2%29-5%20%3D%20-4-5%20%3D%20-9)
Answer:
Hello
Step-by-step explanation:
The domain is limited with 2 lines parallel: -1 ≤ x ≤ 1
and the disk ? (inside of a circle) of center (0,0) and radius 2
![dom\ f(x,y)=\{(x,y) \in \mathbb{R} ^2 | \ -1\leq x \leq -1\ and \ ( -\sqrt{4-x^2} \leq \ y \leq \sqrt{4-x^2}\ ) \ \}\\](https://tex.z-dn.net/?f=dom%5C%20f%28x%2Cy%29%3D%5C%7B%28x%2Cy%29%20%5Cin%20%5Cmathbb%7BR%7D%20%5E2%20%7C%20%5C%20-1%5Cleq%20x%20%5Cleq%20-1%5C%20and%20%5C%20%28%20-%5Csqrt%7B4-x%5E2%7D%20%20%5Cleq%20%5C%20y%20%20%5Cleq%20%5Csqrt%7B4-x%5E2%7D%5C%20%20%29%20%5C%20%5C%7D%5C%5C)