Rationalize the denominator and simplify. Assume all variables represent nonnegative real numbers.
A. 
B. 
C. 20
D. 3
Answer: B
Mathematics
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Find the mass of the wire that lies along the curve r and has density ?.r(t) = 
i + 3tj, 0 ? t ? 1; ? = 4t
A. 2 units
B. 
units
C. 
units
D. 
units
Mathematics
Solve the system.x2 + 2xy + y2 = 9x2 + 2xy - y2 = -9
A. {(0, 3), (0, -3), (6, 3), (6, -3)} B. {(0, 3), (0, -3), (6, 3), (-6, -3)} C. {(0, 3), (0, -3), (-6, 3), (-6, -3)} D. {(0, 3), (0, -3), (-6, 3), (6, -3)}
Mathematics
Give all possible rational zeros for the polynomial.f(x) = 2x3 + 7x2 + 13x - 8
A. ±1, ±2, ±4
B. ±1, ±2, ±4, ±8
C. ±1, ± 
, ±2, ±4, ±8
D. ±1, ± 
, ± 
, ± 
, ±2
Mathematics
Solve the equation.
= 0
A. {0} B. {-4, 0} C. {-4, 4} D. {0, 4}
Mathematics