My math problem is 920÷310 can somebody me

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

Construct the graph that models the given situation

Tony is charged $ 50 and additional $0.15 per miles for renting a car. a) represent the cost of renting a car with an equation,and the determine the cost if he drove it70 miles.b) what would be the cost of a car rental if the car was driven 250 miles? show work