As Sally and George practice for the SAT, their scores on practice tests rise. Sally’s current score is $850$, and it is rising by $10$ points per week. On the other hand, George’s current score is $570$ and is growing by $50$ points per week.

1. When will George’s score catch up to Sally’s?

   Hint (a):

   Sally's score will be defined by the expression $850+10x$, since her initial score was $850$ and it increases by $10$ points each week.
   
   George's score, on the other hand, will be defined by the expression $570+50x$, since his initial score was $570$ and it increases by $50$ each week.

   More Help (a):

   $850+10x=570+50x$

   Answer (a):

   $x=7$

2. If the SAT test is in $12$ weeks, who will score highest?

   Hint (b):

   Insert $12$ for $x$ in the equation found in part (a) to see who will have the higher score.