Tell whether the relation is a function.{(-5, -9), (-3, -6), (1, 6), (7, 1)}
A. Function
B. Not a function
Answer: A
Mathematics
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Determine the period of the given function.y = 3 cos x
A. ?
B. 3
C. 2?
D. 
Mathematics
Evaluate the expression.165/4
A. 512 B. 256 C. 128 D. 32
Mathematics
Find the area of the triangle. If necessary, round the answer to two decimal places.A = 30°, b = 10, c = 5
A. 21.65 B. 12.5 C. 23.65 D. 10.5
Mathematics
Simplify.
A. 
B. 
C. - 
D. 
Mathematics