Decide whether the expression is or is not an identity.tan 
cos x + tan 
= sin x
A. Identity
B. Not an identity
Answer: A
Mathematics
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Find all points where the function is discontinuous.
A. x = 2 B. None C. x = -2, x = 2 D. x = -2
Mathematics
Solve the problem.How many different amounts of money can you pay if you use four coins including dimes and quarters?
A. 6 amounts B. 3 amounts C. 4 amounts D. 5 amounts
Mathematics
Solve the problem.Suppose a car rental company charges $110 for the first day and $60 for each additional or partial day. Let S(x) represent the cost of renting a car for x days. Find the value of S(4.5).
A. $320 B. $270 C. $350 D. $380
Mathematics
Use the rules of exponents to simplify the expression. Write the answer with positive exponents. Assume that all variables represent positive real numbers.
A. x25/3
B. 
C. 
D. x17/3
Mathematics