Simplify the expression by using a sum or difference identity.sin(17°) cos (-8°) - cos(17°) sin (-8°)
A. cos 9°
B. sin 9°
C. cos 25°
D. sin 25°
Answer: D
Mathematics
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Find the derivative.p = 
A. 
= 
B. 
= - 
C. 
= - 
D. 
= 
Mathematics
Use the discriminant to determine the number and type of solutions for the equation. If the solution(s) are real, state whether they are rational or irrational.4x2 - 12x + 9 = 0
A. Two irrational solutions B. Two rational solutions C. One rational solution D. Two nonreal complex solutions
Mathematics
Factor completely. If the polynomial is prime, say so.16p4 - 81q4
A. (2p + 3q)(2p - 3q)(4p2 + 9q2) B. (2p + 3q)3(2p - 3q) C. (2p + 3q)(2p - 3q)(4p2 - 9q2) D. (2p + 3q)(2p + 3q)(4p2 - 9q2)
Mathematics
Solve the problem.Use the line graph to determine how many more hours were needed to prepare for Test 2 than for 
.
A. 4 B. 3 C. 1 D. 2
Mathematics