HELP PLEASE

If given an equation of a line such as -1/2x+6 how would you create an equation of a line parallel and perpendicula to this line that goes through another point such as (4,10)

The vet charges $45 for an office visit and $10 for each vaccination your dog needs. write an eaquation

1. how do you convert the repeating, nonterminating decimal 0. to a fraction? explain the process as you solve the problem.