Solve the inequality.For the function f(x) = x2 + 10x + 21, solve f(x) > 0.
A. (-3, ?)
B. (-?, -7)
C. (-7, -3)
D. (-?, -7) ? (-3, ?)
Answer: D
Mathematics
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For the given polar equation, write an equivalent rectangular equation. 8r cos ? + 3r sin ? = 1
A. 8y + 3x = 1
B. 8x + 3y = 1
C. 
+ 
= 1
D. 8x + 3y = x2 + y2
Mathematics
Evaluate the integral.
A. 19 B. -19 C. 0 D. 1
Mathematics
Solve the problem.An athlete prepares for the 300-meter dash. How far will she run in yards?
A. 492.3 yd B. 270 yd C. 762 yd D. 333.3 yd
Mathematics
Simplify.(9 + 13) ? (21 - 7)
A. 50 B. 36 C. 455 D. 308
Mathematics