Determine the rectangular equation of the curve whose parametric equations are given.x = 3 cos t, y = 5 sin t ; 0 ? t ? 2?
A. 
- 
= 1; -? < x < ?
B. 
- 
= 1; -3 ? x ? 3
C. 
+ 
= 1; -3 ? x ? 3
D. 
+ 
= 1; -3 ? x ? 3
Answer: D
Mathematics
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Suppose that y is inversely proportional to x. Use the given information to find the constant of proportionality k. Then use y = 
to find y for the given value of x.y = 28.2 when x = 6;
Find y given x = 36.
A. k = 148.2; y = 4.7 B. k = 169.2; y = 4.7 C. k = 4.7; y = 169.2 D. k = 187.2; y = 5.2
Mathematics
Evaluate the expression.
A. 5040 B. 0 C. 7 D. 1
Mathematics
Solve the equation.
= -1
A. 
B. 
C. {-8}
D. 
Mathematics
Solve the equation after making an appropriate substitution.x1/2 - 9x1/4 + 18 = 0
A. {81, 1296} B. {3, 6} C. {9, 36} D. {-3, -6}
Mathematics