Respuesta :
Answer:
3.5
Step-by-step explanation:
make an equation out of the ratios -- 10/35 = 1/x
cross multiply -- 10x=35
divide both sides by 10
x=3.5
10:35=1:? which means 10 was divided by 10 so 35 has to be divided by 10 which equals x=3.5