Simplify the following rational expression.
?
?
A. 
B. ?
C. ?
D. ?
E. ?
Answer: B
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Solve the problem.An airline charter service charges a fare per person of $200 plus $20 for each unsold seat. The airplane holds 200 passengers. Let x represent the number of unsold seats and write an expression for the total revenue R for a charter flight.
A. R(x) = (200 - x)(200 + 20x) or 40,000 + 4,000x - 20x2 B. R(x) = (200 - x)(200 + 20x) or 40,000 + 3,800x - 20x2 C. R(x) = 200(200 + 20x) or 40,000 + 4,000x D. R(x) = x(200 + 20x) or 200x + 20x2
Solve the problem.Suppose that P(x) represents the percentage of income spent on housing in year x and I(x) represents income in year x. Determine a function H that represents total housing expenditures in year x.
A. H(x) = 
(x)
B. H(x) = (P + I)(x)
C. H(x) = (I - P)(x)
D. H(x) = (P ? I)(x)
Convert the equation to polar form. x² - y² = 4
a. r = 4 csc2? b. r = 2 csc? c. r = 2 sec2? d. r² = 4sec2? e. none of these
Solve the problem.A certain number is three times as large as a second number. Their sum is 120. What are the two numbers?
A. 28 and 84 B. 93 and 27 C. 28 and 92 D. 30 and 90