Respuesta :

Answer:

under 21 its 7, above 12 is 36, above 20 is 60, and under 90 is 60

Step-by-step explanation:

15/3=5

21/3=7

12*3=36

20*3=60

90/3=60

basically look at the pattern of 15:5 you can divide it my 3 so the it’d be multiply by 3 or divide 3.

15:5, 21:7, 36:12, 60:20, 90: 30