Correct option is:
B. 2
<h2>
Explanation:</h2>
From the double number line shown we can set:

So we can solve this problem by using either equation (3) or (4). So, choosing equation (3):

<h2>Learn more:</h2>
Solving equations: brainly.com/question/7747308
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Answer:
The 1st option
Step-by-step explanation:
Because x can be anything that's not imaginary and y has to be below 2 always because of the negative value added before the 3. Also it's impossible to reverse the sign of the negative because negative x would only result in 3 becoming a fraction.
To solve for the longest side, the hypotenuse, you have to use the pythagorean theorem. It will be 10^2 + 9^2 = c^2. 100 + 81 =c^2.
c^2 = 181 so c = sqrt(181).
to find sin of A do opposite/hypotenuse which gives you 9/sqrt(181)
to find cos of A do adjacent/hypotenuse which gives you 10/sqrt(181)