At what points is the given function continuous?f(x, y) = tan (x + y)
A. All (x, y) ? (0, 0)
B. All (x, y) such that x + y ? 
, where n is an integer
C. All (x, y)
D. All (x, y) ? 
Answer: B
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Perform the indicated operations.(n + 10)2
A. n + 100 B. n2 + 100 C. n2 + 20n + 100 D. 100n2 + 20n + 100
Solve.The sum of three numbers is 5. The sum of the first and second numbers is 3, and the first number is one more than three times the third number. How many of the numbers are even numbers?
A. 1 B. None C. 2 D. 3
Solve the Problem
If 6 tickets to a concert cost $70.50, how much are 15 tickets?
Solve the problem.A study in a small town showed that the percent of residents who have college degrees can be modeled by the function 
where x is the number of years since 2005. Does this model indicate that the percent of residents with a college degree is increasing or decreasing?
A. Increasing B. Decreasing