Find the exact value of the expression using a sum or difference identity.tan 
A. 2 + 
B. -2 - 
C. 
D. 
Answer: B
Mathematics
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Solve the problem.If a rock is thrown vertically upward from the top of a building 80 feet high with an initial velocity of 64 feet per second, the height, h, above ground level after t seconds is given by h = -16t2 + 64t + 80, where h is in feet and t is in seconds. How many seconds will it take the rock to reach its maximum height?
A. 1 sec B. 5 sec C. 4 sec D. 2 sec
Mathematics
Solve the inequality. Give the solution set in both set-builder notation and graph form.3 ? 6x + 9 and 2x + 4 < 10
A. 
B. 
C. 
D. 
Mathematics
Factor completely.5x3 + 10x2 - 40x
A. (x - 2)(5x2 + 20) B. (5x2 + 10x)(x - 4) C. 5x(x - 2)(x + 4) D. 5x(x + 2)(x - 4)
Mathematics
Solve the equation.0.50x - 0.20(50 + x) = 0.16(50)
A. 50 B. 60 C. 30 D. 70
Mathematics