The letters r and ? represent polar coordinates. Write the equation using rectangular coordinates (x, y).r(1 - 2 cos ?) = 1
A. x2 + y2 = 2 + x
B. x2 + y2 = 1 + 2x
C. x2 + y2 = (1 + 2x)2
D. x2 + y2 = (2 + x)2
Answer: C
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Find the function f?g and its domain if 
and 
.
What will be an ideal response?
Simplify the expression.
(y + 3) + 7y
A. 
y + 12
B. 3y - 12
C. 
y - 12
D. 3y + 12
Approximate the value using a calculator. Express answer rounded to three decimal places.e-1.9
A. -0.150 B. -5.165 C. 0.450 D. 0.150
Solve the problem.To find the distance between two small towns, an electronic distance measuring (EDM) instrument is placed on a hill from which both towns are visible. The distance from the EDM to the towns is 
and 
and the angle between the two lines of sight is 
Find the distance between the towns to the nearest tenth of a mile.
A. 4.0 mi B. 5.8 mi C. 3.1 mi D. 5.3 mi