Add or subtract vertically.Subtract -x3y3 + x2y2 - x2y - 4x + 4 from 7x3y3 + 6x2y2 - x2y + xy2 + 4x + 2.
A. 8x3y3 + 5x2y2 + xy2 + 8x - 2
B. 8x3y3 + 7x2y2 + x2y + 8x - 2
C. 8x3y3 + 7x2y2 - 2x2y + xy2 + 6
D. 8x3y3 + 5x2y2 + 2xy2 - 2
Answer: A
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Find the equation of the tangent line to the equation at the point where x has the given value.y = (2x2 + 3x + 4)(2x - 3); x = 0
A. y = - 1x + 12 B. y = -1x - 12 C. y = - 1x - 12 D. y = -1x + 12
Let v and w be two vectors in the plane with given magnitudes. The angle between v and w is ?. Find the expression. Round the answer to the nearest tenth.
= 15, 
= 12, ? = 29°
Find 
A. 13.1 B. 37.8 C. -590.7 D. 28.3
Rationalize the denominator. Assume all variables represent positive real numbers.
A. 
+ 9
B. x - 9
C. 
- 9
D. x + 9
Solve.Ted walks around a lake on a path that is 5
miles long. It takes him 4
hours to complete his walk. What is his average speed (in miles per hour)?
A. 1
miles per hour
B. 1
miles per hour
C. 2
miles per hour
D. 1
miles per hour