Question

Find y if the distance between D( y, 7) and E( 1, 15) is 10.
Solution :
By distance formula, d(D, E) = (Formula)
10 = V(1 - y)2 + 82
On squaring both sides, 100 =
(1-y)² = 36
1-y=6 or 1-y=-6
..y=
or y =
answers​

Answer 1

Step-by-step explanation:

√(y-1)^2+(7-15)^2=10

(y-1)^2+64=100

(y-1)^2=36

y-1=6 or y-1=-6

y=7 or. y=-5