Round 6,584,003 to the nearest 1,000

At the newest animated movie, for every 9 children, there are 4 adults. there are a total of 39 children and adults at the movie.

What are the coordinates of the midpoint of ab? ,1/2) /2,-1) ,-3/2) /2,-2)

Solve for x and y: 217x + 131y = 913; 131x + 217y = 827