Find the rectangular equation of the given polar equation.r = 2(sin ? - cos ?)
A. 2x2 + 2y2 + x - y = 0
B. 2x2 + 2y2 - x + y = 0
C. x2 + y2 + 2x - 2y = 0
D. x2 + y2 - 2x + 2y = 0
Answer: C
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Simplify the exponential expression. Write any negative exponents as positive exponents. Assume all variables represent positive real numbers.(-64)4/3
A. 4,096 B. not a real number C. 256 D. -256
Solve by graphing.The cost y (in hundreds of dollars) of tuition at one community college is given by the linear equation 
where x is the number of credits for which a student registers. Graph the equation and use the graph to estimate the cost of tuition if a student registers for 14 credits. 
A. $2900 B. $2500 C. $1700 D. $1950
Rationalize the denominator of the expression. Assume that all variables represent positive real numbers.
A. 
B. 
C. 
D. - 
Solve for the variable.
x = -24
A. 18 B. -24 C. - 32 D. -18