Question 969233
√(1+8)^2+(y+5)^2=√(1+4)^2+(y+10)^2
81+y^2+10y+25=25+y^2+20y+100
10y+81=20y+100
10y=-19
y=-19/10=-1.9
The value of y is -1.9.

Verifying
√81+(3.1)^2=√25+(8.1)^2
√90.61=√90.61