Determine a parametric representation for the given equation. Answers may vary.x2 + y2 = 81
A. x = 81 cos t, y = 81 sin t
B. x = cos t, y = sin t
C. x = 9 sin t, y = cos t
D. x = 9 cos t, y = 9 sin t
Answer: D
Mathematics
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Solve. Two cars leave an intersection. One car travels north, and the other travels east. When the car traveling north has gone 9 miles, the distance between the cars is 3 miles more than the distance traveled by the car heading east. How far has the eastbound car traveled?
A. 9 miles B. 18 miles C. 15 miles D. 12 miles
Mathematics
Simplify the expression. Assume all variables represent positive real numbers.
A. 4x
B. x 
C. 
D. 
Mathematics
Let A = 
and B = 
.
(a) Compute 
(b) Compute 
(c) Compute 
(d) Compute 
(e) Compute 
Mathematics
Simplify completely.
A. 
B. - 
C. 
D. 
Mathematics