Question

Which equation is not equivalent to the formula r = st?

A) s = r/t

B) t = r/s

C) s = t/r

D) r = ts

Answer 1

Well, the commutative property would make D be equivalent, so we can cross that out.

Answer 2

Which ones can we cross out?

Answer 3

B can also be crossed out. \[r=st\]\[\frac{ r }{ s }=\frac{ st }{ s }\]\[\frac{ r }{ s }=t\]