Simplify. Assume variables represent nonnegative values.
A. 4
B. 16
C. 4
D. 6
Answer: C
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Use a sum-to-product identity to rewrite the expression.cos (8t2) - cos (5t2)
A. -2cos (6.5t2) sin (1.5t2) B. -2sin (6.5t2) cos (1.5t2) C. -2sin (6.5t2) sin (1.5t2) D. -2cos (6.5t2) cos (1.5t2)
Find the vertex, focus, and directrix of the parabola. Graph the parabola.x2 - 12x - 4y + 64 = 0
A. vertex: (6, 7)
focus: (6, 6)
directrix: y = 8
B. vertex: (6, 7)
focus: (7, 7)
directrix: x = 5
C. vertex: (6, 7)
focus: (6, 8)
directrix: y = 6
D. vertex: (6, 7)
focus: (5, 7)
directrix: x = 7
Multiply the polynomials using the FOIL method. Express the answer as a single polynomial in standard form.(3x + 10y)(-3x + 7y)
A. -9x2 - 30xy + 70y2 B. -9x2 - 9xy - 9y2 C. -9x2 + 21xy + 70y2 D. -9x2 - 9xy + 70y2
Evaluate the function as indicated.Find g(a + 1) when g(x) = 4x - 2.
A. 4a + 2
B. 
a - 2
C. 4a - 2
D. 4a - 1