Help me answer for a and b please

Without graphing the linear functions, find the coordinates of the point of intersection of their graphs: y=3x−11 and y=4

Jayda's house is located at (1, 5). she can walk in a straight line to get to cristian's house. a fast-food restaurant is located at (11, 0) and partitions the way from jayda's house to cristian's house by a ratio of 5: 1. find the coordinate of cristian's house. me . im a little stuck

Which math sentence can be used to determine if the triangle is a right triangle?