Find the amplitude, period or displacement.Find the amplitude of y = -5 cos (2x - ?).
A. -10
B. ?
C. 5
D. 2
Answer: C
Mathematics
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Factor completely. If the polynomial is prime, state so.z2 - 81
A. (z + 9)(z - 9) B. (x - 9)2 C. prime D. (x + 9)2
Mathematics
Find an algebraic expression equivalent to the given expression.cot (arcsin 
)
A. 
B. 
C. 
D. 
Mathematics
Estimate. Choose a rounding digit that gives one or two nonzero digits.0.0714 ÷ 72
A. 0.01 B. 100 C. 1000 D. 0.001
Mathematics
Identify the equation as a parabola, circle, ellipse, or hyperbola.x2 + y2 = 25
A. Ellipse B. Parabola C. Circle D. Hyperbola
Mathematics