What is the word phrase for 5+(17-8)

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

Given: m∠ adb = m∠cdb ad ≅ dc prove: m∠ bac = m∠bca lol

How do i multiply two digit numbers