Respuesta :

apologiabiology
one way is to make into fracitons and simplify

A.5/7=25/35?
yes, true

B. 6/9=18/36?
no

C. 9/18=16/36?
no

D. 35/120=75/250?
no


another way is
if a/b=c/d, then (ad)/(bc)=1 or ad=bc


A is answer