Add or subtract as indicated. Simplify, if necessary.
+ 
A. 
B. 
C. 
D. 
Answer: A
Mathematics
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Find the unit vectors that are parallel to the tangent line to the curve y=2x² at the point (2,8).
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Mathematics
Answer the question.If k < 0, what is the solution set of 
= k?
A. ?
B. {0}
C. (-?, ?)
D. {
}
Mathematics
Write a system of equations for the problem, and then solve the system.The manager of a candy shop sells chocolate covered nuts for $7 per pound and chocolate covered raisins for $11 per pound. The manager wishes to make a 200-pound 
mixture that will sell for $8 per pound. How many pounds of each should be used?
A. Nuts: 50 lb; raisins: 150 lb B. Nuts: 100 lb; raisins: 100 lb C. Nuts: 150 lb; raisins: 50 lb D. Nuts: 125 lb; raisins: 75 lb
Mathematics
Graph the equation.
?
?
A. ?
?
B. ?
C. ?
D. ?
E. ?
Mathematics