Simplify. Be sure to rationalize all denominators. Assume that all variables represent positive real numbers.
A. 
B. 
C. 2
D. 
Answer: B
Mathematics
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Solve the problem.The strength S of a rectangular wooden beam is proportional to its width times the square of its depth. Find the dimensions of the strongest beam that can be cut from a 
cylindrical log. (Round answers to the nearest tenth.)
A. w = 7.5; d = 10.6 B. w = 8.5; d = 9.6 C. w = 8.5; d = 11.6 D. w = 6.5; d = 11.6
Mathematics
Find the LCD. Build up the fractions to equivalent fractions having the LCD as the denominator.
and 
A. 
and 
B. 
and 
C. 
and 
D. 
and 
Mathematics
Solve the system. x - y + 4z = 35x + z = 0 x + 5y + z = -15
A. (0, 0, -3) B. (0, -3, 3) C. (0, -3, 0) D. No solution
Mathematics
Graph the rational function.
?
?
Note that the numerator and denominator of the fraction share a common factor.
?
A. ?
?
B. ?
?
C. ?
D. ?
E. ?
Mathematics