The letters r and ? represent polar coordinates. Write the equation using rectangular coordinates (x, y).r = cos ?
A. (x + y)2 = x
B. x2 + y2 = x
C. (x + y)2 = y
D. x2 + y2 = y
Answer: B
Mathematics
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Graph the equation.4x = y + 2
A. 
B. 
C. 
D. 
Mathematics
Perform the indicated operation.5x - 2(5x2 - 5x + 1) + (8x2 + 4x - 1)
A. -2x2 + 4x - 2 B. -2x2 + 19x - 3 C. 18x2 + 19x + 3 D. 3x2 + 14x - 3
Mathematics
Find the particular solution that satisfies the initial condition.
; Initial Condition: 
when 
?
A. ?
B. ?
C. ?
D. ?
E. ?
Mathematics
Provide an appropriate response.Find the reciprocal of - 
.
A. 1
B. -20
C. 
D. 20
Mathematics