Find a set of parametric equations for the given Cartesian equation.y = 9x + 7
A. x = 7t, y = t + 9
B. x = 9t, y = t + 7
C. x = t, y = 
+ 9
D. x = t, y = 9t + 7; x = 
, y = t + 7
Answer: D
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Find the coordinates of the centroid of the curve.Find the coordinates of the centroid of the curve x = 4 cos t + 4t sin t, y = 4 sin t - 4t cos t, 
A. (
, 
) = 
B. (
, 
) = 
C. (
, 
) = 
D. (
, 
) = 
Use the even-odd properties to find the exact value of the expression. Do not use a calculator.csc 
A. 
B. - 
C. -2
D. 2
Find the coordinates of the vertices of the polygon in its new position. ? Original coordinates of vertices: (6, 5), (3, 2), (4, 2), (5, 2)? Shift: six units downward, two units to the left ?
A. (13, -1), (1, -4), (2, -4), (3, -4) B. (10, -1), (1, -4), (2, -4), (3, -4) C. (12, -1), (1, -4), (2, -4), (3, -4) D. (4, -1), (1, -4), (2, -4), (3, -4) E. (11, -1), (1, -4), (2, -4), (3, -4)
Evaluate. The differential is exact.
A. 1 B. 16 C. 15 D. 13