Find a general term an for the geometric sequence.3, 9, 27, 81, 243, ...
A. an = 3n-1 + 2
B. an = 3n
C. an = 6n
D. an= 3 + 6(n - 1)
Answer: B
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Plot the point in the rectangular coordinate system.(1.5, -6.5)
A. 
B. 
C. 
D. 
Solve the equation.
= 
A. x = 6, x = 7
B. x = 21, x = 
C. x = 
, x = -6
D. x = 21, x = -7
Use a graphing calculator to solve the system of equations. Round your solutions to one decimal place.2.3x - 0.5y - 3.2z = -4.94.9x - 7.0y - 0.3z = -5.02.5x + 0.7y - 4.5z = 0.3
A. (29.7, 20.7, 19.7) B. (119.0, 82.8, 78.7) C. (238.0, 165.6, 157.4) D. (59.5, 41.4, 39.4)
Solve the problem.An object is propelled vertically upward from the top of a 80-foot building. The quadratic function 
models the ball's height above the ground, 
in feet, t seconds after it was thrown. How many seconds does it take until the object finally hits the ground? Round to the nearest tenth of a second if necessary.
A. 0.7 seconds B. 3.5 seconds C. 7.7 seconds D. 2 seconds