What is the center and radius of the circle with the given equation (x-1)^2+(y+1)^2=4?

When using the linear combination metho e linear combination method to solve a system of linear equations, the four options are:

What is the best way to answer questions with a x expression in the question. for example 3x + 10x=?

The architect's side view drawing of a saltbox-style house shows a post that supports the roof ridge. the support post is 8 ft tall. the distance from the front of the house to the support post is less than the distance from the post to the back of the house. how far from the front of the house is the support post positioned?