Y / 5 = .2 multiply both sides by 5
the answer is Y = 1
(y-5)/4 = 7 y-5 = 28 y = 33
y/9 - 2/5 = 1/3 => y = 6 3/5 or 6.6
5/4
No, the two lines are not perpendicular.
If: x = -5 Then: y = (3*-5)-1 = -16
(y-5)/4 = 7 y-5 = 28 y = 33
y/9 - 2/5 = 1/3 => y = 6 3/5 or 6.6
5/4
x/y = 5/(y^2) and y/x = 5/(x^2). So x/y + y/x = 5/(y^2) + 5/(x^2), which equals 5x^2/(x^2 y^2) + 5y^2/(x^2 y^2) equals 5(x^2 + y^2)/25 equals (x^2 + y^2)/5. x^2 = 25/y^2, so you get (25/y^2 + y^4/y^2)/5 equals ((25 + y^4)/y^2)/25, which shows that your math teacher is on crack. Seriously, I'm not sure that's true.
No, the two lines are not perpendicular.
It is: 5/9x-y+2 = 0
If: x = -5 Then: y = (3*-5)-1 = -16
y = -1/10
cross multiply 3/6=y/10 30=6y y=5
-1
y = -2/5
You have to know what x and y equals first!