Ireally need solving this problem

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

If jaime wants to find 60% of 320, which table should he use?

What is the solution to the equation? k/6.4=8.7 2.3 5.568 15.1 55.68