Solve the equation by completing the square.x2 - 8x - 13 = 0
A. {8 - 
, 8 + 
}
B. {4 - 
, 4 + 
}
C. {4 - 
, 4 + 
}
D. {-4 - 
, -4 + 
}
Answer: B
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Convert the radian measure to degrees. Round your answer to two decimal places. 103.0
A. 11,802.94° B. 5.49° C. 323.58° D. 5901.47°
Write the shaded area in the figure as a mixed number and as an improper fraction.
A. 2
; 
B. 1
; 
C. 1
; 
D. 2
; 
Use the addition property of equality to solve the equation.x + 15 = 16
A. 31
B. 1
C. 
D. -1
Write the number as indicated.An expensive telescope has found evidence that the universe contains about121,400,000,000 galaxies. Write the number in words.
A. One hundred twenty-one billion, four hundred thousand galaxies B. One hundred twenty-one billion, four hundred million galaxies C. One hundred twenty-one billion, four million dollars galaxies D. One hundred twenty-one million, four thousand galaxies