Answer: $ 205
Explanation:
Let x be the amount (in dollars) of money she will earn by mowing 10 lawns.
Given : Mia's weekly income varies directly with the number lawns she mows.
She earns $143.50 mowing 7 lawns .
Then by using proportionality , we have

Hence, she will earn $ 205 if she mows 10 lawns.