Find the amplitude, period and phase shift of y = 3cos(2x).
What will be an ideal response?
Amplitude: 3 ; Period: ? ; Phase shift: 0
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Solve and check your solutions.-18.9 = -2.1x
A. x = 16.8 B. x = 9 C. x = -16.8 D. x = 2
For each equation, find the missing value in the ordered pairs.3x + y = -20( , 7), ( , 40),( , -20)
A. (-9, -9), (-20, 40), (0, -20) B. (-9, 7), (-20, 40),(0, -20) C. (-9, 7), (-20, -40), (0, 40) D. (-9, 7), (-20, -20), (0, -20)
Use properties of logarithms to write each expression as a sum or difference of logarithms. Assume that variables represent positive real numbers.log11 
A. 
log11 9 - 2 log11 s - 2log11 r
B. 9 log11 9 - 2 log11 s - log11 4
C. 
log11 9 - 2 log11 s - log11 r
D. log11 9 - log11 s - log11 r
Solve the problem.An initial investment of $1000 is appreciated for 3 years in an account that earns 10% interest, compounded annually. Find the amount of money in the account at the end of the period.
A. $1210.00 B. $1464.10 C. $1331.00 D. $331