Anybody help please hm

Kapil needed to buy a long wooden beam. he went to two sawmills that each charge an initial fee plus an additional fee for each meter of wood. the following equation gives the price (in dollars) of a wooden beam from the first sawmill as a function of its length (in meters). p = 5+20xp=5+20x

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

Which of the following are accepted without proof in a logical system? check all that apply.