Answer the question.Which one of the equations below matches the graph?
A. y = -2 cos
B. y = 2 sin
C. y = -2 sin
D. y = -2 sin
Answer: C
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Solve the problem.Suppose that the daily cost C of manufacturing x bicycles is given by 
Then the average daily cost 
is given by 
How many bicycles must be produced each day in order for the average cost to be no more than 
A. at most 190 bicycles B. at least 19 bicycles C. at least 190 bicycles D. at least 1900 bicycles
Solve the equation.
- 
= 0
A. 
B. 
C. 
D. 
Solve the system of equations using substitution. Note that the system may be inconsistent or consistent with dependent equations.
A. (7, -1) B. (8, -2) C. All ordered pairs along 7x - 68 = 6y D. No solution
Solve.A plane flying with a tailwind flew at a speed of 500 mph, relative to the ground. When flying against the tailwind, it flew at a speed of 300 mph. Express these relationships as equations. Let x represent the speed of the plane in calm air and let y represent the speed of the wind.
A. x + y = 500 y = 300 B. x + y = 300 y = 500 C. x + y = 500 x - y = 300 D. x + y = 300 x - y = 500