Equivilent expressions for 5n plus 15n

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

Bring the fraction a/a-4 to a denominator of 16-a^2

If sin(x) = 0 and cos(x) = 1, what is tan(x)?