Express the sum or difference as a product.sin 9x - sin 3x
A. 2 sin 3x cos 6x
B. 2 sin 6x cos 3x
C. 2 cos 3x cos 6x
D. 2 sin 3x
Answer: A
Mathematics
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Solve the inequality and give the solution in interval notation.9x - 9 > 36 or -x + 7 ? -4
A. [5, 11) B. (-?, ?) C. (5, 11] D. (5, ?)
Mathematics
Solve the problem.Suppose you pay $3.00 to roll a fair die with the understanding that you will get back $5.00 for rolling a 4 or a 6, nothing otherwise. What is your expected net winnings?
A. $5.00 B. -$1.33 C. $3.00 D. -$3.00
Mathematics
Complete the square for the binomial. Then factor the resulting perfect square trinomial.x2 - 5x
A. 
; x2 - 5x - 
= 
2
B. 
; x2 - 5x + 
= 
2
C. 25; x2 - 5x + 25 = (x - 5)2
D. 
; x2 - 5x + 
= 
2
Mathematics
Solve for the variable.1.1x - 4.5 = 0.5x - 2.4
A. x = -0.286 B. x = 3.51 C. x = 3.535 D. x = 3.5
Mathematics