Can someone plzzz help mee ill give brainlest

What is the value of 1/3x + 7x when x = 5

1. are the triangles similar and if so why? what is the value of x? show your work.

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