Find the exact value of the expression.cos 
sin 
- cos 
sin 
A. 
B. 
C. 1
D. 
Answer: D
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Simplify the expression. Use positive exponents. Assume variables represent nonnegative numbers.(-8x5)(-4x4)
A. -12x9 B. -12x20 C. 32x9 D. -32x20
Write the function in standard form and find the vertex.f(x) = -5x2 - 10x + 4
A. f(x) = -5(x + 1)2 + 9; (-1, 9) B. f(x) = -5(x + 2)2 - 6; (-2, -6) C. f(x) = -5(x - 1)2 - 11; (1, -11) D. f(x) = -5(x - 2)2 - 36; (2, -36)
Plot a scatter diagram.
A. 
B. 
C. 
D. 
An objective function and a system of linear inequalities representing constraints are given. Graph the system of inequalities representing the constraints. Find the value of the objective function at each corner of the graphed region. Use these values to determine the maximum value of the objective function and the values of x and y for which the maximum occurs.Objective Function z = 6x + 7yConstraints x ? 0 y ? 0 2x + 3y ? 12 2x + y ? 8
A. maximum 32; at (3, 2) B. maximum 52; at (4, 4) C. maximum 32; at (2, 3) D. maximum 24; at (4, 0)