Add or subtract as indicated.
- 
A. 
B. 
C. 
D. 
Answer: D
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Determine if the following is a function or not. The set of ordered pairs {(animal, zebra), (bird, sparrow), (flower, tulip), (tree, maple)} from the set {animal, bird, tree, flower} to the set {zebra, sparrow, tulip, maple}
A. Yes B. No
Find all the first order partial derivatives for the following function.f(x, y) = xye-y
A. 
= ye-y; 
= xe-y(y - 1)
B. 
= ye-y; 
= - xye-y
C. 
= ye-y; 
= xe-y(1 - y)
D. 
= ye-y; 
= xe-y
Solve the problem.A barge takes 3 hours to move (at a constant rate) downstream for 21 miles, helped by a current of 2 miles per hour. If the barge's engines are set at the same pace, find the time of its return trip against the current.
A. 42 hours B. 7 hours C. 3 hours D. 5 hours
Use the discriminant of the equation to determine the number of x-intercepts.f(x) = -4x2 - 8x + 4
A. Two x-intercepts B. One x-intercept C. No x-intercepts