Use the composition cancellation equations to decide whether or not the functions are inverses of each other.f(x) = 
, x ? -4 and g(x) = x2 + 4
A. Yes
B. No
Answer: B
Mathematics
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Find the focus and the directrix of the parabola.y = 2x2 - 8x + 7
A. Focus: 
; directrix: y = - 
B. Focus: 
; directrix: y = - 
C. Focus: (2, 7); directrix: x = 9
D. Focus: (2, 1); directrix: x = -3
Mathematics
Evaluate.7x - 4 for x = - 
A. - 
B. - 
C. -18
D. 
Mathematics
Use rules of exponents to simplify the expression. Use positive exponents to write your answer.
A. x10
B. x60
C. 
D. 
Mathematics
Solve the problem.John earns $13.99/hour. If he works 17 hours, how much will he earn?
A. $237.93 B. $238.93 C. $237.84 D. $237.83
Mathematics