Please provide the answer to the problem(s) shown below!

Mathematics

1 answer:

netineya [11]3 years ago

4 0

4) The solution of 2 lines is where they intersect. In this case it is (4,4) for both lines A and B.

5) Two lines with infinite solutions mean that they are the exact same line, so you can change the original equation to y=mx+b form.

2x + 2y = 8 divide each side by 2 to get x + y = 4

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4 years ago

Help please; I need the right answer

Ad libitum [116K]

Answer:

Step-by-step explanation:

$\cos x+\sqrt{2}=-\cos x \\ 2\cos x = -\sqrt 2 \\ \cos x = -\dfrac{\sqrt 2}{2}\\ \\ \Rightarrow x = \pm \arccos\Big(-\dfrac{\sqrt 2}{2}\Big)+2k\pi,\quad x\in \mathbb{Z}\\ \Rightarrow x =\pm\dfrac{3\pi}{4}+2k\pi\\ \\ \\k = -1 \Rightarrow x < 0\\\\ k=0 \Rightarrow x 2\pi$