Solve for c when 9=c(c-8)

can you show your work too? this question confuses me!

For how answer my question this will be the last question can you answer in math subject

The border line of the linear inequality 4x + 7y < 5 is dotted true or false?

Heather is writing a quadratic function that represents a parabola that touches but does not cross the x-axis at x = -6. which function could heather be writing? fx) = x2 + 36x + 12 = x2 - 36x - 12 f(x) = -x + 12x + 36 f(x) = -x? - 12x - 36