Find a Cartesian equation for the parametric equations.x = 5 tan ?, y = 4 cot ?
A. y = 
cos x
B. y = 
sin x
C. xy = 20
D. 
= 20
Answer: C
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Determine ? in decimal degrees, 0° ? ? ? 90°. Round results to an appropriate number of significant digits.cot ? = 1.237
A. 38.950° B. 34.830° C. 38.95° D. 34.83°
Find the mean.Ten students in Mrs. Smith's math class took a state sponsored aptitude test. Their math scores were reported to Mrs. Smith: 496, 597, 359, 351, 592, 360, 344, 599, 482, and 470. Find the mean score. Round your answer to one decimal place if necessary.
A. 465.0 B. 474.5 C. 476.0 D. 455.9
For a test question, a mathematics teacher wants to find two constants a and b such that the test item "Simplify 
)" will have an answer of 
. What constants should the teacher use for a and b?
?
A. 
B. ?
C. ?
D. ?
E. ?
For the polynomial, list each real zero and its multiplicity. Determine whether the graph crosses or touches the x-axis at each x -intercept.f(x) = 
x2(x2 - 5)(x - 1)
A. 0, multiplicity 2, touches x-axis;
1, multiplicity 1, crosses x-axis
B. 0, multiplicity 2, crosses x-axis;
1, multiplicity 1, touches x-axis
C. 0, multiplicity 2, touches x-axis;
1, multiplicity 1, crosses x-axis;
, multiplicity 1, crosses x-axis;
-
, multiplicity 1, crosses x-axis
D. 0, multiplicity 2, crosses x-axis;
1, multiplicity 1, touches x-axis;
, multiplicity 1, touches x-axis;
-
, multiplicity 1, touches x-axis