B. infinitely many solutions
Answer: 
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Explanation:
Use the pythagorean trig identity
and plug in the fact that 
Isolating sine leads to
. I'm skipping the steps here, but let me know if you need to see them.
The result is negative because we're in quadrant 4, when y < 0 so it's when sine is negative.
Therefore,

Hey! The answer is "<span>B)16 2/3%." Hope I helped, and have a great day!
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5(x-3)-x =
Multiply Everything In The Parentheses By 5
5x-15-x