Determine whether the relations represent functions. Identify the domain and range of each relation.
A. function
domain: [3, ?)
range: (-?, ?)
B. not a function
C. function
domain: [0, ?)
range: (-?, ?)
D. function
domain: (-?, ?)
range: [3, ?)
Answer: A
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Simplify by removing a factor equal to 1.
A. 
B. 
C. 
D. 5y7
Solve the problem.Let A = 
and B =
. Find A + B.
A. 
B. 
C. 
D. 
Answer the question asked. When necessary, round to the nearest hundredth.Mark and Rachel both work for Smith Landscaping Company. Mark can finish a planting job in 5 hours, while it takes Rachel 3 hours to finish the same job. If Mark and Rachel will work together on the job, and the cost of labor is $40 per hour, what should the labor estimate be? (Round to the nearest cent, if necessary.)
A. $75.00 B. $21.33 C. $160.00 D. $150.00
Simplify.16 + 2 - (-4)
A. 10 B. 14 C. -22 D. 22