Add or subtract.(6x2y - 4xy + 4xy2) - (6xy - 4xy2 + 3x2y)
A. 3x2y - 8xy2 - 10xy
B. 3x2y - 8xy2 + 2xy
C. 7x2y + 4xy2 - 10xy
D. 3x2y + 8xy2 - 10xy
Answer: D
Mathematics
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Convert the angle in radians to degrees.- 
A. -
°
B. -90°
C. -2°
D. -90?°
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Represent the vector in the form v = ai + bj whose magnitude and direction angle are given.
= 7; ? = 225°
A. v = - 
i - 
j
B. v = - 
i - 
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i + 
j
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