Find the exact value of the trigonometric expression without the use of a calculator.If tan ? = 
, ? < ? < 
and cos ? = - 
, 
< ? < ?, find the exact value of tan (? + ?).
A. 
B. - 
C. 
D. - 
Answer: B
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Solve the equation for y.x = 3y + 7
A. y = 
x - 7
B. y = 
x - 
C. y = x - 
D. y = 3x - 7
Solve the problem.The function f(x) = 1 + 1.6 ln (x + 1) models the average number of free-throws a basketball player can make consecutively during practice as a function of time, where x is the number of consecutive days the basketball player has practiced for two hours. After how many days of practice can the basketball player make an average of 6 consecutive free throws?
A. 78 days B. 22 days C. 24 days D. 80 days
Add or subtract, if possible. Assume that all variables represent non-negative values. Simplify your answer. 
+ 
A. 
B. 
C. 
D. 
Find the x- and y-intercepts. If no x-intercepts exist, state so.f(x) = x2 - 4
A. (0, ±
), (0,4)
B. (±
, 0), (0,4)
C. (±
, 0), (0,-4)
D. (0, ±
), (0,-4)