Please refine the question.
There are an infinite number of values for x between -4 and 4. And each one of those points has a y value associated with it. There is simply too much information requested.
y / r2 = a constant (k) so k = 405/81 ie 5. k = y/4 when r = 2, so y = 20.
y = 36
8
if you are asking what y equals heres what it is y=54+4 y=58
x=4 y=4
y equals x plus 4 when y equals 0 then x equals 2i i is the square root of negative 1
25
i think it would be like this: 4:25 :: 1:6.25
80=4x, z=6x. find Z. x=80/4, x=20. z=6x20 z=120 answer= 120
y / r2 = a constant (k) so k = 405/81 ie 5. k = y/4 when r = 2, so y = 20.
-1
y = 36
8
if you are asking what y equals heres what it is y=54+4 y=58
y = 3x = 12y = 12
If x equals the square root of ...., then you already have solved for x
y varies inversely as x2 so y = c/x2 for some constant c. When x = 5, y = 4 So c = x2y = 100 that is y = 100/x2 Then, when x = 2, y = 100/4 = 25