Question

5,3 = 28 ; 7,6 =55 ; 4,5 = 21 ; 3,8 = ?
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Answer 1

Answer:

25

Step-by-step explanation:

5×3=15

15+13=28

7×6=42

42+13=55

4×5=20

20+1=21

8×3=24

24+1=25

Answer 2

Step-by-step explanation:

5,3 = 28

5*5+3=25+3=28

7,6 =55

7*7+6=49+6=55

4,5 = 21

4*4+5=16+5=21

so 3,8=3*3+8=9+8=17

3,8=17