Simplify the expression. Assume that all variables represent non-negative real numbers.7
- 5xy
A. -3xy2
B. 2xy3
C. 2x2y3
D. -3x2y2
Answer: A
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Find the Jacobian 
or 
(as appropriate) using the given equations.
A. -25 B. 24 C. 25 D. 600
Graph the function f(x) over the given interval. Partition the interval into 4 subintervals of equal length. Then add to your sketch the rectangles associated with the Riemann sum 
, using the indicated point in the kth subinterval for ck.f(x) = 2x + 4, [0, 2], left-hand endpoint
A. 
B. 
C. 
D. 
Find the vertex, focus, and directrix of the parabola. Graph the equation.(x + 3)2 = -(y + 2)
A. vertex: (-3, -2)
focus: (-3, -2.25)
directrix: y = -1.75
B. vertex: (-3, -2)
focus: (-3.25, -2)
directrix: x = -2.75
C. vertex: (3, 2)
focus: (3, 1.75)
directrix: y = 2.25
D. vertex: (3, 2)
focus: (2.75, 2)
directrix: x = 3.25
Determine whether the equation defines y as a function of x.x = y2
A. y is a function of x B. y is not a function of x