Answer:
y=7
Step-by-step explanation:
Since this is a right triangle, we can use the Pythagorean theorem.
a^2 + b^2 = c^2
6^2 + y^2 = (sqrt(85))^2
36 + y^2 = 85
Subtract 36 from each side
36-36 +y^2 = 85-36
y^2 =49
Take the square root of each side
sqrt(y^2) = sqrt(49)
y = 7
