Respuesta :
7+13+1.5=21.5
If he did it again the way back, it's 21.5 times 2.
He went a total of 43 blocks.
Let's just add up all the blocks when he was going to the store:
[tex]7+13+1.5=21.5[/tex]
Since he walked back, we would just multiply that by 2:
[tex]2*21.5 = 43[/tex]
So, your answer is 43 blocks. Hope I could help!