kyle starts with $15.00 and saves 3.50each day. which expression reprensets the total amount kyle saves?

Match each statement with its corresponding value for the system below: y = -2(3)x and y = 9x - 2 1. the number of points of intersection. -2 2. the x-coordinate of the solution. 1 3. the y-coordinate of the solution. 0

How do you solve a question like this?

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