Replace the polar equation with an equivalent Cartesian equation. 7r cos ? + 8r sin ? = 1
A. 7x + 8y = 1
B. 7y + 8x = 1
C. 7x + 8y = x2 + y2
D. 
+ 
= 1
Answer: A
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Evaluate the improper integral or state that it is divergent.
A. - 
B. Divergent
C. 
D. - 
Given the set sketched on the number line, identify the type of interval (open, closed, half-open, open infinite, closed infinite), write the set using set-builder notation, and write the set using interval notation.
A. open infinite interval; {x|x < -2}; (-?, -2) B. open infinite interval; {x|x > -2}; (-2, ?) C. closed infinite interval; {x|x ? -2}; (-?, -2] D. closed infinite interval; {x|x ? -2}; [-2, ?)
Use a calculator graph to solve the equation. 2 ( x + 2 ) = 3x – 1
A) x = 7 B) x = 5 C) x = 4 D) x = 3 E) { }, empty set, no real-number solution; the lines are parallel
Find the measures of each marked angle.
A. 107°, 22° B. 78°, 22° C. 107°, 73° D. 78°, 73°