Solve for the variable.
x - 
x = 2
A. x = 14
B. x = -16
C. x = 16
D. x = -14
Answer: B
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Solve the system.2x + 4y + 8z = 168 x + 2y + 4z = -28 x + y + z = -6
A. (-5, -2, -6) B. (-6, -5, -2) C. (-6, -2, -5) D. No solution
Interpret the linear equation.The speed of a ball dropped from a tower is given by the linear function y = 32x where y is in feet per second and x is the number of seconds since the ball was dropped. Find and interpret the slope and y-intercept of the linear equation.
A. m = 32; The speed of the ball is 32 feet per second. b = 0; When the ball is dropped at x = 0, the ball has fallen 0 feet. B. m = 0; The speed of the ball does not increase as time passes. b = 32; At time x = 0, the ball has fallen 32 feet. C. m = 32; The speed of the ball increases 32 feet per second every second. b = 0; The speed of the ball was 0 the moment it was dropped. D. m = 32; The speed of the ball increases 32 feet per second every second. There is no y-intercept to interpret.
Find the probability.A bag contains 4 red marbles, 5 blue marbles, and 8 green marbles. What is the probability of choosing a blue marble when one marble is drawn?
A. 
B. 
C. 
D. 
Find the expected value.A new light bulb has been found to have a 0.02 probability of being defective. A shop owner receives 500 bulbs of this kind. How many of these bulbs are expected to be defective?
A. 20 B. 100 C. 10 D. 500