Perform the indicated operation, whenever possible.Let A = 
and B = 
. Find A - B.
A. 
B. 
C. 
D. 
Answer: D
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Solve the system by the substitution method. Be sure to check all proposed solutions. x - 4y = -35x - 3y = -15
A. {(3, -1)} B. {(-3, 0)} C. {(-2, -3)} D. ?
Use the vertical line test to determine whether the relation is also a function. Then state the domain and range of the relation or function.
A. Function, D: (-?, ?), R: [-4, ?) B. Not a function, D: (-?, ?), R: [-4, ?)
Use least common multiple or greatest common divisor to solve the problem.Three clocks chime every 21 minutes, 39 minutes, and 91 minutes, respectively. If the three clocks chime together, how much time must pass before they will chime together again?
A. 151 minutes B. 819 minutes C. 273 minutes D. 3549 minutes
Write the interval as an inequality involving x, and illustrate the inequality using the real number line.(-?, -8)
A. x ? -8
B. x ? -8
C. x < -8
D. x < -8