Solve the equation by completing the square.2x2 + 16x + 18 = 0
A. {-4 - 
, -4 + 
}
B. {4 - 
, 4 + 
}
C. {-4 + 
}
D. {-4 - i
, -4 + i
}
Answer: A
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Solve the problem.The speed of a stream is 4 mph. If a boat travels 88 miles downstream in the same time that it takes to travel 44 miles upstream, what is the speed of the boat in still water?
A. 14 mph B. 8 mph C. 12 mph D. 15 mph
Provide an appropriate response.Find the standard deviation for the scores:21322825233026282728
A. 3.06 B. 26.8 C. 3.22 D. 10.4
Complete.668 mm = 
cm
A. 6680 B. 66.8 C. 66,800 D. 6.7
Solve the problem.Consider the following simplified digital photograph that has a 3 × 3 grid with four gray levels numbered from 0 to 3. It shows a letter Y in black on a light gray background.
Let A be the 3 × 3 matrix that represents this figure digitally. Find the matrix which represents the entire picture becoming one shade lighter.
A. 
B. 
C. 
D. 