What is the constant of proportionality in the equation y=x/9?

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

Kendra had twice as much money as kareem. kendra later spent $8 and kareem earned $6. by then,the two had the same amount of money. how much money did each have originally?

Which inequalities can be used to find the solution set of the following inequality? check all that apply. |2x – 5| (2x – 5) (2x + 5) –(2x – 5) –(2x + 5)