Subtract. Simplify, if possible.-16 - (-4)
A. -20
B. 12
C. -12
D. 20
Answer: C
Mathematics
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Solve the equation by using the quadratic formula. Give only real number solutions.x2 + 4x = 7
A. 
B. 
C. 
D. 
Mathematics
Find a unit vector u in the direction of the given vector.
A. 
B. 
C. 
D. 
Mathematics
Find the perimeter of the figure.
A. 4n + 25 B. 34n C. 34 D. 9n + 25
Mathematics
Express in terms of i.
A. 2
B. 2i
C. -2
D. -2i
Mathematics