Answer:
Z(-0.2, 2.2).
Step-by-step explanation:
We will use section formula when a point, say P, divides any segment ,say AB, internally in the ratio m:n.
![[x=(mx_2+nx_1)/(m+n), y= (my_2+ny_1)/(m+n)]](https://img.qammunity.org/2020/formulas/mathematics/middle-school/y1mls6i4kihz5kjlksdqx22xju9kchidug.png)
We have been given the points of segment XY as X at (-2,1) and Y at (4,5) and ratio is 3:7.

Upon substituting coordinates of our given points in section formula we will get,
![[x=((3*4)+(7*-2))/(3+7), y= (3*5+7*1)/(3+7)]](https://img.qammunity.org/2020/formulas/mathematics/middle-school/yat3vtiw8urnj2h9rw865aqqithjv9qac3.png)
![[x=(12-14)/(10), y= (15+7)/(10)]](https://img.qammunity.org/2020/formulas/mathematics/middle-school/kfc5tgeuly2tqbo6z417rca438nxfq7ld4.png)
![[x=(-2)/(10), y= (22)/(10)]](https://img.qammunity.org/2020/formulas/mathematics/middle-school/kkqsjag1bt42mu6ghbl8cfjokiyy5tha63.png)
![[x=-0.2, y= 2.2]](https://img.qammunity.org/2020/formulas/mathematics/middle-school/6gpemavfhq1rx8rryx0myvg7u8utl9fb9p.png)
Therefore, coordinates of point Z will be (-0.2, 2.2).