I need help some one help me

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?

Which of the following points is a solution to the system of equations shown? y - x = -1 x + y = -5

What is the benefit of converting measures in a ratio to the same unit