Ian and 3 friends decide to go on a short sailing course.

each hour costs £35 for the first person and £10 for each additional person.

how much will it cost for the 4 of them to go sailing for 2 hours?

It will cost for 4 of them to go sailing for 2 hours.

Step-by-step explanation:

Given:

Total No of friends = 4

Cost of 1 hour = £35 for the first person + £10 for each additional person =  

∴ Cost of 2 hour =

step-by-step explanation:

the answer is 128

aloha~! my name is zalgo and i am here to you out on this amazing day. to answer your question, yes, nonzero numbers can have a greatest common factor and that would be 1. still don't get it? let me considering every number is divisible by 1 and hence every number has 1 as a factor of theirs. so, if 2 nonzero numbers didn't share any gcf (greatest common factor), they would still have a factor in common and that would be 1.

i hope that this ! : p

"stay and stay proud! " - zalgo

(by the way, do you mind marking me as brainliest? i'd greatly appreciate it! mahalo! x3)