Find the axis of symmetry of the given function.f(x) = -2x2 - 16x - 31
A. x = 1
B. x = -1
C. x = 4
D. x = -4
Answer: D
Mathematics
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Solve.Suppose that the sales of a particular brand of appliance satisfy the relationship 
where S(x) represents the number of sales in year x, with x = 0 corresponding to 1990. For what years will sales be between 2160 and 2960?
A. Between 7 and 12 B. Between 1995 and 2000 C. Between 1996 and 2001 D. Between 1996 and 2000
Mathematics
Guess the rule used to change one number into another.
A. n2 + 10 B. 3n + 8 C. 4n + 6 D. None of the above is the correct rule.
Mathematics
Factor out the GCF from the polynomial. If the GCF is 1, write prime.a7 - 19a5
A. a5(a2 - 19) B. a(a6 - 19a4) C. a5(a2 + 19) D. a2(a5 - 19)
Mathematics
Determine whether or not the function is one-to-one.
A. No B. Yes
Mathematics