True, it is a function because mainly the x and y values are the same;]
Answer:
the number of kilometers hiked in all is 
Step-by-step explanation:
The computation of the number of kilometers hiked in all is shown below:
= Erwin + Jericho

Hence, the number of kilometers hiked in all is 
The answer is B 78.5 is the the answer
3x+1/2x+7x/x+5=
Answer is 17x^2+16x+5/2x^2+10x
Workup in photo below