The letters r and ? represent polar coordinates. Write the equation using rectangular coordinates (x, y).r = 2(sin ? - cos ?)
A. 2x2 + 2y2 = y - x
B. x2 + y2 = 2y - 2x
C. x2 + y2 = 2x - 2y
D. 2x2 + 2y2 = x - y
Answer: B
Mathematics
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Provide an appropriate response.Perform the indicated operations without a calculator: 152 =
A. 150 B. 225 C. 30 D. 23
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Use transformations to graph the function.y = -5 sin (x + 
)
A. 
B. 
C. 
D. 
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Find the phase shift of the function.y = sin 
A. 
B. 2?
C. - 
D. 1
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Find the perimeter of the polygon. You may first need to find the measures of the unknown sides. Assume that all angles are right angles. The polygon is not drawn to scale.
A. 137
ft
B. 152
ft
C. 152
ft
D. 169
ft
Mathematics