Solve the linear programming problem.Maximize and minimize z = 18x - 22y subject to:x ? 0,
y ? 0,
4x + 5y ? 30,
4x + 3y ? 20,
x ? 5,
y ? 8.
A. maximum: 90; minimum: 0
B. maximum: -132; minimum: 0
C. maximum: -87.5; minimum: -132
D. maximum: 90; minimum: -132
Answer: D
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Determine the quadratic function whose graph is given.
A. f(x) = -x2 - 9 B. f(x) = x2 - 9 C. f(x) = -x2 + 9 D. f(x) = x2 + 9
Solve.The amount of paint needed to cover the walls of a room varies jointly as the perimeter of the room and the height of the wall. If a room with a perimeter of 70 feet and 
walls requires 
of paint, find the amount of paint needed to cover the walls of a room with a perimeter of 40 feet and 10-foot walls.
A. 4 quarts B. 40 quarts C. 8 quarts D. 400 quarts
From the graph of the quadratic function 
, determine the equation of the axis of symmetry.
A. 
B. 
C. 
D. 
E. 
Determine the maximum number of turning points of f.f(x) = (x - 2)2(x + 4)2
A. 2 B. 1 C. 3 D. 4