Use Cramer's rule to solve the system. If D = 0, use another method to complete the solution. 3x - 2y + 2z - w = 2 4x + y + z + 6w = 8-3x + 2y - 2z + w = 5 5x + 3z - 2w = 1
A. 
B. 
C. ?
D. 
Answer: C
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Solve the problem. Unless stated otherwise, assume that the projectile flight is ideal, that the launch angle is measured from the horizontal, and that the projectile is launched from the origin over a horizontal surfaceA baseball is hit when it is 2.1 ft above the ground. It leaves the bat with an initial velocity of 
at a launch angle of 22°. At the instant the ball is hit, an instantaneous gust of wind blows against the ball, adding a component of -13.3i (ft/sec) to the ball's initial velocity. How high does the baseball go? Round your answer to the nearest tenth.
A. 43.0 ft B. 47.1 ft C. 52.4 ft D. 45.1 ft
Indicate whether the inequality is true or false.0.5 ? -1
A. True B. False
Write an expression for the general or nth term, an, for the geometric sequence.3, 6, 12, 24, . . .
A. an = 3 ? 2n B. an = -3 ? (-2)n-1 C. an = 3 ? 2 D. an = 3 ? 2n-1
Solve the problem. Round your answer to two decimal places.The distance an object falls when dropped from a tower varies directly as the square of the time it falls. If the object falls 144 feet in 3 seconds, how far will it fall in 15 seconds?
A. 3600 ft B. 4050 ft C. 240 ft D. 3150 ft