If a+b+c=0 for a, b,c then prove a²/bc+b²/ca+c²/ab=3.

Question: a) does the given set of points represent a linear function? how do you know? b) assume that the point (-2,4) lies on the graph of a line. what y-values could complete this set of ordered pairs that lie on the same line: (- (hint: there are several correct answ

Express the following as a function of a single angle. cos(60) cos(-20) - sin(60) sin(-20)

Evaluate each expression. determine if the final simplified form of the expression is positive or negative -42 (-4)2 42