Multiply and simplify. Assume that all variables represent positive real numbers.(
+ 
)(
- 
)
A. 
+ 
- 
+ 3
B. 
+ 
+ 
+ 3
C. 
+ 
+ 
- 3
D. 
+ 
- 
- 3
Answer: D
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Provide an appropriate response.For the students at one college the expected value for "number of siblings" is 1. Which of the following statements is a reasonable conclusion?
A. If a student is selected at random, the most likely number of siblings for the student is 1. B. If a student selected at random has 2 siblings, the next student selected will have no siblings. C. If 4 students are selected at random, the average number of siblings for the 4 students will be 1. D. If 100 students are selected at random, the average number of siblings for the 100 students will be close to 1.
Solve the equation.
x + 
= 
A. 3
B. 1
C. 
D. 
Solve the system by the substitution method. If there is no solution or an infinite number of solutions, so state. Use set notation to express the solution set.
A. {(-4, 9)} B. {(-3, 8)} C. no solution; ? D. {(3, 9)}
Graph the equation.y = 2x + 3
A. 
B. 
C. 
D. 