What number gives you a result of -7 when 11 is subtracted from the quotient of the number and 5

X/5 - 11 = -7                           20/5 - 11 = -7
      +11   +11                             4   - 11  = -7
x/5 = 4                                          -7  =    -7
(5/1)x/5 = 4(5/1)
        x   =  20

X^2 - 4x +(4/2^2) + y^2 + 8y + (8/2^2) = -4 + (4/2^2) + (8/2^2)(x + 2)^2 + (y + 4)^2 = -4 + 4 + 16your center is (-2, -4) and the radius is the sqrt of -4 + 4 + 16 which is 4