Add.18 + (-20) + 22 + (-21)
A. -3
B. 81
C. -45
D. -1
Answer: D
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Rationalize the numerator. Assume that all variables represent positive real numbers.
A. 
B. 
C. 
D. 
Decide whether the following is an expression or an equation. If it is an expression, simplify it. If it is an equation, solve it.
A. Equation; -3
B. Equation; 3
C. Expression; 
D. Expression; - 
Provide an appropriate response.The payoff table for three possible courses of action A1, A2, and A3 is given below.pi?A1xi?A2xi?A3xi?.3$70$40$50.2$100$120$110.1$160$140$90.4$80$140$160Which course of action will produce the largest expected value? What is it?
What will be an ideal response?
A boy is standing on a flat field and tosses his ball toward a second boy standing at the other end of the field. The path of the ball is a parabola, and the equation of the path is 
True or False? The axis of the parabola is horizontal.
A. False B. True