Answer:
C = (4, 4.75)
Explanation:
Point C will divide segment AB into the ratio 3:5, matching the respective rates of travel. Then the location of point C can be found from ...
C = (5A +3B)/(3+5)
C = (5(1, 1) +3(9, 11))/8 = (5 +27, 5 +33)/8 = (4, 4.75)
The point where Anna and Mary meet is (4, 4.75).