Solve by substitution and check.x + y = 9 y = 2x + 3
A. (7, 2)
B. (2, 7)
C. (3, 6)
D. (1, 9)
Answer: B
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Solve the problem.For a charter flight, an airline charges a fare of $200 per person plus $4 per person for each unsold seat on the plane. If the plane holds 100 passengers and if x represents the number of unsold seats, find an expression for the total revenue received for the flight and find the maximum revenue.[Hint: To find an expression for the total revenue, multiply the number of people flying, 
by the price per ticket.]
A. R(x) = (100 - x)(200 + x) maximum revenue: $22,500 B. R(x) = (100 - x)(200 + 4x) maximum revenue: $22,500 C. R(x) = 204(100 - x) maximum revenue: $20,400 D. R(x) = (100 - x)(200 + 4x) maximum revenue: $18,000
Determine whether the statement is true or false.17 < 13
A. False B. True
Perform the indicated operation.-16.618 + 17.08
A. 34.698 B. 33.698 C. 0.562 D. 0.462
Sketch the graph of the function. Label at least three points.f(x) = 
A. 
B. 
C. 
D. 