Given the polynomial 2x^3+18x^2-18x-162, what is the value of the constant "k" in the factored form?
2x^3+18x^2-18x-162= 2(x+k)(x-k)(x+9)

Find the center and the radius of the circle with the equation: x^2-2x+y^2+4y+1=0?

Which graph represents the equation y =4x

Celeste wants to have her hair cut and permed and also go to lunch. she knows she will need $50. the perm cost twice as much as her haircut and she needs $5 for lunch. how much does the perm cost?