What is the radius of a circle whose equation is (X +5 )2+(Y -3 )2=four squared

Write an expression that has three terms and simplifies to 4x - 7. identify the coefficient(s) and constant(s) in your expression

Li buys supplies so he can make and sell key chains. he begins to make a profit only after he sells 4 key chains. what point on the graph makes the most sense in this situation?

Can someone, me with this. i really need with this