Solve the problem.A retailer knows that n games can be sold in a month at a price of 
dollars per game. Assume that he buys each game for 
and sells everyone that he buys. If he wishes to make a profit of at least 
per month on sales of this game, how many games must he sell each month?
A. 0 ? n ? 30
B. 30 ? n ? 80
C. 25 ? n ? 40
D. 30 ? n ? 50
Answer: D
Mathematics
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Find the period when f = 100 Hz.
a. 1 msec b. 10 msec c. 100 msec d. 1000 msec e. 10 sec
Mathematics
Express f(x) in complete factored form.f(x) = x2 + 3
A. f(x) = (x + i
)2
B. f(x) = (x + 
)(x + i
)
C. f(x) = (x + 
)2
D. f(x) = (x + i
)(x - i
)
Mathematics
Perform the indicated operations. Write the resulting polynomial in standard form.(-8x5 - 9x4 - 3x3 - 3) + (2x5 + 7x4 + 9x3 + 6)
A. 10x5 + 16x4 + 12x3 + 3 B. 10x5 + 16x4 + 12x3 + 9 C. -6x5 - 2x4 + 6x3 + 3 D. -6x5 + 16x4 + 12x3 + 9
Mathematics
Use Gauss-Jordan elimination to find the solution. Write the solution as an ordered triple.7x + 7y + z = 1 x + 8y + 8z = 89x + y + 9z = 9
A. (0, 1, 0) B. (-1, 1, 1) C. (1, -1, 1) D. (0, 0, 1)
Mathematics