Factor completely.30 - 39x - 9x2
A. -3(x + 5)(3x - 2)
B. -3(x - 5)(3x + 2)
C. (3x + 15)(-3x + 2)
D. (x + 5)(-9x + 6)
Answer: A
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Which of the following has the greater payout and why? I. A 40% probability of winning $9,000 and a 60% probability of no payout. II. An 75% probability of winning $2,000 and a 25% probability of no payout. ?
A. ?I. has the higher payout. The expected value is $3,600. B. ?II. has the higher payout. The expected value is $1,500. C. ?I. has the higher payout. The expected value is $5,400. D. ?II. has the higher payout. The expected value is $500. E. ?Both have the same payout.
Simplify.
A. 
B. 
C. 4t + 7u
D. 7t + 4u
Use mathematical induction to prove the statement is true for all positive integers n.(69)n = 69n
What will be an ideal response?
Complete the identity.1 - cos(2?) + cos(6?) - cos(8?) = ?
A. 4 sin ? sin(3?) sin(4?) B. 4 cos ? cos(3?) cos(4?) C. 4 cos ? cos(3?) sin(4?) D. 4 sin ? cos(3?) sin(4?)