Simplify the following by combining like terms.- 
x2 - 
x + 
+ 
x2 - 
x - 
A. - 
x2 - 
x - 
B. - 
x2 - 
x + 
C. - 
x6 + 
D. - 
x4 - 
x2 + 
Answer: B
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Suppose ? is an angle in standard position. Given either a point on the terminal side of ? or an equation of the terminal side of ?, give the exact value of the indicated trigonometric function(s). (6, 8); find cos ?.
A. 
B. 
C. 
D. 
Find the domain and range of the function.f(x) = -2x2 - 36x - 167
A. Domain: (-?, ?); Range: (-?, 9] B. Domain: (-?, ?); Range: (-?, -5] C. Domain: (-?, -5] ; Range: [9, ?) D. Domain: (-?, -5]; Range: [0, ?)
Graph the function, showing all asymptotes (those that do not correspond to an axis) as dashed lines. List the x- and y-intercepts.f(x) = 
A. No x-intercepts, no y-intercepts ;
B. No x-intercepts, no y-intercepts ;
C. No x-intercepts, no y-intercepts ;
D. No x-intercepts, no y-intercepts ;
Solve the linear programming problem.Minimize 4x1 + 5x2subject to 2x1 - 4x2 ? 10 2x1 + x2 ? 15and x1 ? 0, x2 ? 0
A. Minimum = 20 when x1 = 5 and x2 = 0
B. Minimum = 30 when x1 = 
and x2 = 0
C. Minimum = 75 when x1 = 0 and x2 = 15
D. Minimum = 33 when x1 = 7 and x2 = 1