Evaluate the function for the given value.Find f(1 + 6t) when f(x) = 15.
A. 91
B. 15 + 90t
C. 15 + 6t
D. 15
Answer: D
Mathematics
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Sketch the surface z = f(x,y).f(x, y) = 1 - x - 2y
A. 
B. 
C. 
D. 
Mathematics
Simplify the sum.(3x - 5y) + (-x + y)
A. 2x - 6y B. 4x - 4y C. 2x - 4y D. 4x - 6y
Mathematics
A cone sliced by a plane results in a type of curve called a conic section. Use the given information and figure to identify the conic section produced in the plane. The plane is perpendicular to the axis of the cone. 
A. parabola B. hyperbola C. ellipse D. circle
Mathematics
Solve.The weight W of an object on the Moon varies directly as the weight E on earth. A person who weighs 141 lb on earth weighs 28.2 lb on the Moon. How much would a 162-lb person weigh on the Moon?
A. 331.2 lb B. 810 lb C. 32.4 lb D. 0.2 lb
Mathematics