Respuesta :

Answer: It would take Aaron 12 hours to mow 21 lawns.

Step-by-step explanation:

This is because 7x3=21, so If we multiply 4 by 3, we get 12. Therefore, It would take Aaron 12 hours to mow 21 lawns.

Answer:

12 hours

Step-by-step explanation:

7 lawns= 4hrs

14 lawns=8 hrs

21 lawns=12 hrs

its a pattern

if you know your multiple of 7 & 4 this would be easy