Name the property. If d + 1 = f, then d=f-1.

Answer this question, only if you know the answer. 30 points and brainliest!

1. what is the measure of ∠abc? what is the measure of ∠abd?

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.