5x + 20 = -5x What does "x" equal?
2 answers:
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When dealing with a quadratic equation, you usually assign the following name to the coefficients of the variables:
So, is the coefficient of
,
is the coefficient of
and
is the constant term.
In your case, the coefficient of is -3, so
The coefficient of is -2, so
The constant term is 6, so
<h3>Answer: Choice B</h3>
Explanation:
Cosine is positive in quadrants I and IV, but quadrant IV isn't shaded in so we can rule out choice A.
Sine is positive in quadrants I and II. So far it looks like choice B could work. In fact, it's the answer because sin(pi/6) = 1/2 and sin(5pi/6) = 1/2. So if 0 ≤ sin(x) < 1/2, then we'd shade the region between theta = 0 and theta = pi/6; as well as the region from theta = 5pi/6 to theta = pi.
Choice C is ruled out because tangent is positive in quadrants I and III, but quadrant III isn't shaded.
Choice D is ruled out for similar reasoning as choice A. Recall that