Answer the question.If we apply the quadratic formula and find that the value of b2 - 4ac is positive, what can we conclude about the solutions?
A. The equation has two irrational solutions.
B. The equation has exactly one rational solution.
C. The equation has two real number solutions.
D. The equation has no real number solutions.
Answer: C
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Solve the system by the addition method.2x2 + y2 = 173x2 - 2y2 = -6
A. {(1, 3), (-1, -3)} B. {(2, 3), (2, -3), (-2, 3), (-2, -3)} C. {(2, -3), (-2, 3)} D. {(1, 3), (1, -3), (-1, 3), (-1, -3)}
Find the exact value of the following expression without using a calculator.csc 270°
A. 0 B. -1 C. undefined D. 1
By graphing the function, visually estimate its domain and range.t(x) = 
A. Domain: [4, ?); range: [4, ?) B. Domain: (-?, 4]; range: (-?, 4] C. Domain: (-?, ?); range: (-?, ?) D. Domain: (-?, 4]; range: [0, ?)
Decide whether or not the ordered pair is a solution of the system.(2, -4)x + y = -6x - y = 2
A. Yes B. No