Log base 10 (10+9x) - log base 10 (11-x) =2

1. what is the measure of ∠abc? what is the measure of ∠abd?

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

Which of the following expressions is equal to 2x^2+8