Rationalize the denominator and simplify. Assume that all variables represent positive real numbers.
A. 
- 
B. 
C. 
- 
D. 
+ 
Answer: A
Mathematics
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Find dy/dx by implicit differentiation. If applicable, express the result in terms of x and y.9y - 5x2 = x - 8
A. 
x
B. 
C. 
D. 
Mathematics
Find the requested product.f(x) = 9x + 5, g(x) = -8x + 5Find (f ? g)(2).
A. 0 B. 253 C. -253 D. -506
Mathematics
Solve the problem.The mathematical model 
represents the cost in dollars a company has in producing x items during a month. Based on this, how much does it cost to produce 
? Interpret the question and answer using function notation.
A. $320,000; f(320,000) = 800 B. $360,000; f(800) = 360,000 C. $360,000; f(360,000) = 800 D. $320,000; f(800) = 320,000
Mathematics
Find an equation of the line described. With undefined slope, through 
A. - 
x + y = -2
B. - 
x - 2y = 0
C. y = -2
D. x = - 
Mathematics