Answer:

Step-by-step explanation:
using form:

where a: starting number
where r: common ratio (in this case each next term is 3 times previous term)
Answer:
10=10
Step-by-step explanation:
Answer:
Step-by-step explanation:
3:9 = 1:3
1:7 = 2:14
12:4 = 24:8
20:5 = 40:10
Hope it helps!
It is true. A ratio compares to two fractions