Find the exact value of the expression.cos 
cos 
- sin 
sin 
A. 0
B. 1
C. -1
D. 
Answer: A
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Identify the degree of the polynomial.15y - y2 + 3y3 + 30 - 
y6
A. 6 B. 15 C. 1 D. 3
Solve.David recently switched to a long distance phone company which charges a monthly fee of $5.95 plus $0.04 per minute. A linear function that expresses the monthly bill B as a function of minutes used m is 
What is the implied domain of this linear function?
A. [5.95, ?) B. [0, 595] C. [0, ?) D. (0, ?)
Write each fraction as an equivalent fraction with the LCD of the two fractions as the denominator.
, 
and 
A. 
; 
; 
B. 
; 
; 
C. 
; 
; 
D. 
; 
; 
Determine the real solutions to the system of nonlinear equations.xy = 16x2 + y2 = 68
A. (2, 8), (8, 2), (2, -8), (8, -2) B. (-2, -8), (-8, -2), (-2, 8), (-8, 2) C. (2, 8), (-2, -8), (2, -8), (-2, 8) D. (2, -2), (-2, -8), (8, 2), (-8, -2)