1=-10 Hello. I'm currently a freshman in highschool and ran across this question and I forgot how to do it before. Can i get some help?​

Jabari is power washing houses for a summer job. for every job, he charges an initial fee plus $30 for each hour of work. his total fee for a 4 -hour job, for instance, is $170 . jabari's total fee,f, for a single job is a function of the number,t, of hours it takes him to complete the job. write the function's formula.

Me i’m stuck on all these questions besides the two bottom ones

If a=0.333333 and b=0.55555, what is the value of a+b