I just need number 15 pls it is due in 3 hours 
Worth 15 points 
                                             
                                          
                                          
                                        
											 
											Answer:
Step-by-step explanation:
Don't know. Maybe you add up the two numbers then divide the answer.
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: