Multiply and simplify.(sin x - cos x)(sec x + csc x)
A. cos x - cot x
B. tan x - sin x
C. tan x - cot x
D. cot x + csc x
Answer: C
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Sketch the graph and show all local extrema and inflection points.y = -x4 + 4x2 - 5
A. Local minima: (-
, 1), (
, 1)
Local maximum: (0, 5)
Inflection point: 
, 
B. Local maxima: (-
, -1), (
, -1)
Inflection points: 
, 
C. Local maxima: (-
, -1), (
, -1)
Local minimum: (0, -5)
No inflection points
D. Local maxima: (-
, -1), (
, -1)
Local minimum: (0, -5)
Inflection points: 
, 
Choose the answer that lists three solutions for the equation.x - 3y = 9
A. (15, 2), (15, 3), (15, 4) B. (-3, 2), (0, 3), (3, 4) C. (0, 9), (3, 18), (4, 21) D. (9, 0), (18, 3), (21, 4)
Perform the indicated operations.23 - (-12)2
A. 30 B. 152 C. -136 D. -138
Evaluate the expression with the given replacement values.x5 when x = -3
A. -15 B. -243 C. 243 D. 15