Solve the equation.
= 4 - x
A. ?
B. {2, 13}
C. {2}
D. {13}
Answer: C
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Factor.z2 - 4z + 4
A. (z - 4)(z + 4) B. (z - 2)2 C. (z + 2)2 D. (z - 2)(z + 2)
Use the formula for 
to solve.To win the lottery in a certain state, one must correctly select 6 numbers from a collection of 52 numbers (one through 52). The order in which the selections is made does not matter. How many different selections are possible?
A. 20,358,520 B. 312 C. 18,009,460 D. 720
Solve the problem.Ten students in a graduate program were randomly selected. Their grade point averages (GPAs) when they entered the program were between 3.5 and 4.0. The following data were obtained regarding their GPAs on entering the program versus their current GPAs. By using linear regression, the following equation is obtained: 
where x is entering GPA and y is current GPA. Use this equation to predict current GPA of a student whose entering GPA is 3.8. Entering GPA Current GPA 3.53.63.83.73.63.93.63.63.53.93.93.84.03.73.93.93.53.83.74.0
A. 3.79 B. 3.41 C. 3.59 D. 3.30
Solve the problem.A painter needs to cover a triangular region 64 meters by 69 meters by 70 meters. A can of paint covers 70 square meters. How many cans will be needed?
A. 15 cans B. 321 cans C. 29 cans D. 3 cans