Identify the equation as either an identity or not.sin 2x sin 2y = cos2(x + y) - cos2(x - y)
A. Not an identity
B. Identity
Answer: A
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Solve using the principle of zero products.Given that f(x) = 9x(5x + 25), find all values of a for which f(a) = 0.
A. 0, 
B. 0, 5
C. 0, - 
D. 0, -5
Solve the problem.At a ticket booth, customers arrive randomly at a rate of x per hour. The average line length is 
where 
To keep the time waiting in line reasonable, it is decided that the average line length should not exceed 6 customers. Solve the inequality 
to determine the rates x per hour at which customers can arrive before a second attendant is needed.
A. 0 ? x ? 18 B. 0 ? x ? 19 C. 0 ? x ? 16 D. 0 ? x ? 17
Find the inverse of the matrix.
?
What will be an ideal response?
Solve the problem.A semicircular driveway has a diameter of 60 ft. How long is the driveway?(Use 3.14 for ? .)
A. 92.2 ft B. 600 ft C. 94.2 ft D. 188.4 ft