Solve the equation by factoring.x2 - 8x - 9 = 0
A. {-1, 9}
B. {1, 9}
C. {1, -9}
D. {-1, -9}
Answer: A
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Solve the problem.During the first four months of the year, Jack earned 
and 
If Jack must have an average salary of at least 
in order to earn retirement benefits, what must Jack earn in the fifth month in order to qualify for
benefits? A. at least $1208 B. at least $1040 C. at most $1180 D. at most $1215
Write the equation of a sine function that has the given characteristics.Amplitude: 4Period: ?Phase Shift: - 5
A. y = sin(4x + 5)
B. y = 4 sin
C. y = 4 sin(x - 5)
D. y = 4 sin(2x + 10)
Approximate the area under the graph of f(x) and above the x-axis using n rectangles.f(x) = 
; interval [1, 5]; n = 4; use left endpoints
A. 1.4636 B. 0.4636 C. 2.0833 D. 1.4236
Solve by completing the square.
A. 0, 14
B. 
C. 
D. none of these