Use division to write the rational expression in the form 
A. 4x - 3 - 
B. 4 - 
C. 4x - 
D. 4 - 
Answer: D
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Solve the problem.A plane flies 450 miles with the wind and 350 miles against the wind in the same length of time. If the speed of the wind is 24 mph, what is the speed of the plane in still air?
A. 192 mph B. 217 mph C. 197 mph D. 182 mph
Find all the first order partial derivatives for the following function.f(x, y) = (9x4y3 + 2)2
A. 
= 72x3y3(9x4y3 + 2); 
= 54x4y2(9x4y3 + 2)
B. 
= 36x3y3; 
= 27x4y2
C. 
= 54x4y2(9x4y3 + 2); 
= 72x3y3(9x4y3 + 2)
D. 
= 2(9x4y3 + 2); 
= 2(9x4y3 + 2)
Identify the vertex, the equation of the axis of symmetry, and the x- and y-intercepts of the graph. Then graph.f(x) = x2 + 5x + 4
A. Vertex: 
;
axis of symmetry: x = - 
;
x-intercepts: (1, 0), (4, 0);
y-intercept: (0, 4)
B. Vertex: 
;
axis of symmetry: x = 
;
x-intercepts: (-1, 0), (-4, 0);
y-intercept: (0, 4)
C. Vertex: 
;
axis of symmetry: x = 
;
x-intercepts: (1, 0), (4, 0);
y-intercept: (0, 4)
D. Vertex: 
;
axis of symmetry: x = - 
;
x-intercepts: (-1, 0), (-4, 0);
y-intercept: (0, 4)
Solve the equation by completing the square.36x2 + 72x + 11 = 0
A. 
B. 
C. 
D. 