Solve the equation.
= -1
A. 
B. 
C. {-8}
D. 
Answer: A
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Find the area of the region specified in polar coordinates.The region inside both 
and 
A. 16(? - 2) B. 8(? - 1) C. 8(? - 2) D. 16(? - 1)
Divide. Write with positive exponents.
A. 3x4 + 18x5 B. 3x4 - 9x2 C. -6x7 - 9x2 D. -6x9
Find the determinant of the matrix and determine if the matrix is invertible 
What will be an ideal response?
Personal taxes. Suppose that the percent of total personal income that is used to pay personal taxes is given by y = 0.034x² - 0.044x + 12.642, where x is the number of years past 1990 (Source: Bureau of Economic Analysis, U.S. Department of Commerce). Find the year or years when the percent of total personal income used to pay personal taxes is 16 percent.
a. 2011 b. 2001 c. 1999 d. 2038 e. 2006