Find the coordinates of the centroid of each triangle with the given vertices. X(-3, 15) Y(1,5), Z(5, 10)

With alll of except for the 2 that i did already

Without multiplying, tell which product is larger and why. 5 × 1/3 or 5 × 2/3 a)5 × 1/3 because 1/3 is less than 2/3 b) 5 × 1/3 because 1/3 is greater than 2/3 c) 5 × 2/3 because 1/3 is less than 23 d) 5 × 23 because 1/3 is greater than 2/3

Find y to the nearest hundreds place