Find the requested equation.The system of equations 
= y - 3xy 
= -x + 5xy describes the influence of the populations (in thousands) of two competing species on their growth rates. Find an equation relating x and y, assuming y = 4 when x = 1.
A. 5y - ln y = ln x - 3x - ln 4 + 17
B. 5y - ln y = ln x - 3x - ln 4 + 23
C. 5y - ln y = ln x - ln 4 + 23
D. 5y - ln y = -3x - ln 4 + 17
Answer: B
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Assuming that the equations define x and y implicitly as differentiable functions 
find the slope of the curve 
at the given value of t.x = t sin t + t, y cos t + y = 2t, t = 
A. 
B. 
C. 2 + ?
D. - 
Use the graph of a known basic function and a combination of horizontal shifts, reflections, and vertical shifts to sketch the function.h(x) = |-x - 3|
A. 
B. 
C. 
D. 
Tell whether or not the relation is a function.{(-1,-2), (3,6), (5,4), (8,-7), (12,6)}
A. Yes B. No
Solve the problem.The manager of a coffee shop has one type of coffee that sells for $8 per pound and another type that sells for $15 per pound. The manager wishes to mix 60 pounds of the $15 coffee to get a mixture that will sell for $11 per pound. How many pounds of the $8 coffee should be used?
A. 70 lb B. 140 lb C. 80 lb D. 40 lb