Solve the problem.A retailer knows that n games can be sold in a month if the price is 
dollars per game. If he buys each game for $6, and if he wishes to make a profit of at least $450 per month on sales of this game, how many games must he sell each month?
A. 30 ? n ? 50
B. 30 ? n ? 80
C. 25 ? n ? 30
D. 25 ? n ? 40
Answer: A
Mathematics
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Find the slope of the curve at the given point P. y = x3 - 7x, P(1, -6)
A. -4 B. 3 C. -7 D. -9
Mathematics
Write the augmented matrix for the system. 3x + 7z = 39 5y + 6z = 76 4x + 6y + 7z = 86
A. 
B. 
C. 
D. 
Mathematics
Multiply, and then simplify if possible. Assume all variables represent positive real numbers.(
- 
)(
+ 
)
A. 2
- 7
+ 2
+ 14
B. 2
+ 7
- 2
+ 14
C. 2
+ 7
+ 2
+ 14
D. 2
+ 7
- 2
- 14
Mathematics
Find the set if the universal set U = {-8, -3, -1, 0, 2, 4, 5, 6, 7, 9}, A = {-8, -3, -1, 2, 5}, B = {-3, 2, 5, 7}, and C = {-1, 4, 9}.A ? B
A. {-3, 2, 5, 7} B. {-3, 2, 5} C. {-8, -3, -1, 2, 5} D. {-8, -3, -1, 2, 5, 7}
Mathematics