The letters x and y represent rectangular coordinates. Write the equation using polar coordinates (r, ?).x2 + 4y2 = 4
A. r2(cos2 ? + 4 sin2 ?) = 4
B. 4 cos2 ? + sin2 ? = 4r
C. r2(4 cos2 ? + sin2 ?) = 4
D. cos2 ? + 4 sin2 ? = 4r
Answer: A
Mathematics
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Find the value of the expression.5 + (-4)(-22) + (-9)
A. 189 B. 117 C. 22 D. 84
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Solve.
(10x - 20) = 
(12x - 6)
A. 
B. -1
C. 1
D. -8
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Begin by graphing the standard cubic function f(x) = x3. Then use transformations of this graph to graph the given function.g(x) = 
x3
A. 
B. 
C. 
D. 
Mathematics