The letters x and y represent rectangular coordinates. Write the equation using polar coordinates (r, ?).2x + 3y = 6
A. 2 sin ? + 3 cos ? = 6r
B. 2 cos ? + 3 sin ? = 6r
C. r(2 cos ? + 3 sin ?) = 6
D. r(2 sin ? + 3 cos ?) = 6
Answer: C
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Find the length of the parametric curve defined over the given interval.x = 5 sin t - 5t cos t, y = 5cos t + 5t sin t, 0 ? t ? 
A. 
?2
B. 
?2
C. 
?
D. 
?2
For the pair of triangles, state the property (SSS, SAS, or ASA) that explains why the triangles are congruent.
A. The triangles are not congruent. B. ASA C. SSS D. SAS
The increase in the number of Hispanic consumers in the United States reflects which of the following demographic trends?
A. change in age structure B. change in geographic distribution C. change in income distribution D. change in ethnic mix
Find the coordinates of the vertex for the parabola defined by the given quadratic function.f(x) = 8 - (x + 5)2
A. (8, -5) B. (-5, 8) C. (5, 8) D. (8, 5)