Rationalize the denominator.
A. -1
B. 
C. 
D. 
Answer: D
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Solve using Cramer's rule.-3x + 7z = 9-4x + 4y + 5z = 35 5x - 8y = -52
A. (9, 3, 9) B. (4, -9, -3) C. (5, 7, 3) D. (4, 9, 3)
Solve the equation by completing the square.x2 + 8x - 3 = 0
A. {-4 - 1
, -4 + 1
}
B. {-1 - 
, -1 + 
}
C. {4 + 
}
D. {-4 - 
, -4 + 
}
Survey analysis In a survey of the dining preferences of 110 dormitory students at the end of the spring semester, the following facts were discovered about Adam’s Lunch (AL), Pizza Tower (PT), and the Dining Hall (DH).
4 liked AL but not PT 19 liked AL only 42 liked AL 55 liked PT 29 liked DH 14 liked PT and AL but not DH 24 liked PT and DH How many liked PT or DH? a. 37 b. 19 c. 20 d. 18
Solve the problem.A foul tip of a baseball is hit straight upward from a height of 4 feet with an initial velocity of 
per second. The function 
+ 4 describes the ball's height above the ground, s(t), in feet, t seconds after it was hit. What is the instantaneous speed of the ball 3.7 seconds after it was hit?
A. -118.4 B. -25.6 C. 25.6 D. 118.4