Solve the system of equations.4x - y + 3z = 122x + 9z = -5x + 4y + 6z = -32
A. (2, 7, -1)
B. (2, -7, -1)
C. (2, -7, 1)
D. (2, 7, 1)
Answer: B
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Solve the problem.Locate and identify the absolute extreme values of sin (ln x) on 
A. Absolute maximum at (e?/2, 1); absolute minimum at (4, sin (ln 4))
B. Absolute maximum at (e?/2, 1); absolute minimum at 
C. Absolute maximum at(5, sin (ln 4)); absolute minimum at (e?/2, -1)
D. Absolute maximum at (5, sin (ln 4)); absolute minimum at (4, sin (ln 4))
Find the foci of the ellipse.49x2 + 16y2 = 784
A. (0, ±7)
B. (0, ±4)
C. (±
, 0)
D. (0, ±
)
Write the sum without sigma notation and evaluate it.
A. -(1 - 3)2 -2(2 - 3)2 -3(3 - 3)2 = -6 B. (1 - 3)2 - (3 - 3)2 = -4 C. -(1 - 3)2 + (2 - 3)2 - (3 - 3)2 = 3 D. -(1 - 3)2 + (2 - 3)2 - (3 - 3)2 = -3
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 $15, and 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. between 20 and 50 games B. between 15 and 25 games C. between 20 and 30 games D. between 15 and 20 games