If r is a positive number and the point (x, y) is in the indicated quadrant, decide whether the given ratio is positive or negative.II, 
A. Positive
B. Negative
Answer: B
Mathematics
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Find the specific function value.Find f(3, 6) when f(x, y) = 
.
A. 10
B. 5
C. 3
D. 9
Mathematics
Find the standard-form equation of the ellipse centered at the origin and satisfying the given conditions.An ellipse with vertices (0, ±7) and foci (0, ±3)
A. 
+ 
= 1
B. 
+ 
= 1
C. 
+ 
= 1
D. 
+ 
= 1
Mathematics
Evaluate the expression.(-2)0
A. 0 B. 1 C. -2 D. -1
Mathematics
Solve and check.x2 - x - 20 = 0
A. -4, -5 B. -5, 4 C. 4, 5 D. -4, 5
Mathematics