Find the GCF.
21x^3 and 189x^9

Which part of a 2-column proof is the hypothesis of the conjecture? a) given b) reasons c) prove d) statements ! i think it's b but i'm not quite

True or false: the graph of y=f(bx) is a horizontal compression of the graph y=f(x) if b< 1

Given that δabc is similar to δdef, which is a possible trigonometric ratio for ∠d? a) tan d = 24 30 b) tan d = 30 24 c) tan d = 18 24 d) tan d = 24 18