Question

9+10=21

3X3=9 5X2=10

3X2=6 3X5=15

so.... 6+15 is 21 :D
that means 9+10 is 21

Answer 1

9+10 = 19

Explanation:

I'm not sure how you got 9+10 = 21 but it is incorrect...

Answer 2

yes

Explanation:

yes