Convert the polar equation to a rectangular equation.r = 5 cos ? + 2 sin ?
A. x2 - y2 = 5x + 2y
B. x2 + y2 = 2x + 5y
C. 5x + 2y = 0
D. x2 + y2 = 5x + 2y
Answer: D
Mathematics
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A. - 
B. -18
C. 18
D. 
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Give the degree measure of ?.? = sin-1 
A. 120° B. 60° C. 135° D. 45°
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Write the fraction.Of the 59 doctors at a hospital, 35 are men. What fraction of the doctors are men?
A. 
B. 
C. 
D. 
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Solve the system of equations algebraically for real values of x and y.
?
?
A. (8, 9), (9, 8) B. (3, 9), (9, 3) C. (9, 8), (9, 8) D. (8, 9), (8, 3) E. no solution
Mathematics