1.

12, 16.5, 25.5, 39, 57, ?​

Answer»

Answer:

79.5

Step-by-step EXPLANATION:

There is a DIFFERENCE of MULTIPLES of 4.5

12+4.5=16.5

16.5+9.0=25.5

25.5+13.5=39

39+18.0=57

57+22.5=79.5



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