Answer:
(2.5, 6.25)
Step-by-step explanation:
Given
A = (-2,4)
C = (4,7)
If B is located on AC such that AB to AC is 1:3
X coordinate of B;
X = ax1+bx2/a+b
X = 1(-2)+3(4)/1+3
X = -2+12/4
X = 10/4
X = 2.5
Y coordinate of B;
Y = ay1+by2/a+b
Y = 1(4)+3(7)/1+3
Y = 4+21/4
Y = 25/4
Y = 6.25
hence the coordinate of B is at (2.5, 6.25)