If 5 becomes 11 and 12 becomes 25, what does 15 become?

31.

Step-by-step explanation:

5+5 = 10 + 1 = 11

12 + 12 = 24 +1 = 25

15 + 15 = 30 + 1 = 31

I don't know I tried to see if that was the pattern. It checks out math wise.

31

Step-by-step explanation:

5---11

12---25

hmmm

isn't that jsut x * 2 + 1?

s

15 would be

15*2+1

which is 31

0.6, 3/5, and 6% are the 3 same portion.

but, when they're all changed to a decimal they would equal to 0.6.

hope this , good luck!