Can somebody lend a hand with some algebra? i'm in a jam and would greatly appreciate some !

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

Aline has a slope of and a y-intercept of –2. what is the x-intercept of the line?

The ph level of a blueberry is 3.1 what is the hydrogen-ion concentration [h+] for the blueberry