5+10=?
(Take, take it all! lol)

How to determine whether two known pairs of points are on the same line.

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

Evaluate the expression for the given value of the variable 2×(c2-5) for c=4