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. = y2  
B. = x2 
C. = x2  
D. = y2 - 14y + 47 

Mathematics