Question

.
3. If the centroid of a triangle formed by (4, a),(-1,-7) and (b, 7) is G(-2,3), find a and b.
A. a=-9, b= -9
B. a = 0, b = 9
C. a = 9. b = -9
D. a = -9, b = 9​

Answer 1

Step-by-step explanation:

-2=4-1+b/3

3+b=-6

b=-9

a-7+7/3 =3

a=9

option c