Use the graphs to evaluate the expression.g(f(2))y = f(x)y = g(x)
A. 4
B. -4
C. 2
D. 0
Answer: C
Mathematics
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Solve the problem.Suppose that z varies jointly with x and y and that z = 22.5 when x = 9 and 
Find the constant of proportionality k. Then, find z when x = 5 and 
A. k = 0.3; z = 13.5
B. k = 1012.5; z = 
C. k = 0.5; z = 22.5
D. k = 5; z = 225
Mathematics
Solve the equation.
(6x - 12) = 
(16x - 8)
A. -1
B. 1
C. -8
D. 
Mathematics
Find the vertex of the parabola.y = -x2 + 2x
A. (1, 1) B. (-1, -1) C. (1, 0) D. (-1, 1)
Mathematics
Find the equation of the parabola determined by the given information.Focus at (-10, -7), directrix x = -14
A. x = 
y2 + 
y - 
B. y = 
x2 + 
x + 
C. y = 
x2 + 
x + 
D. x = 
y2 - 14y + 47
Mathematics