I just need number 15 pls it is due in 3 hours

Worth 15 points

Step-by-step explanation:

Don't know. Maybe you add up the two numbers then divide the answer.

He is wrong in his approach, because the triangle is a 3,4,5, triangle and he should have put √5^2-4^2

Step-by-step explanation:

in geometry, parallel lines are lines in a plane which do not meet; that is, two lines in a plane that do not intersect or touch each other at any point are said to be parallel. by extension, a line and a plane, or two planes, in three-dimensional euclidean space that do not share a point are said to be parallel.