Which expressions are Equivalnt to 2(/6c+3)+4c

Consider the proof. given: segment ab is parallel to line de. prove: what is the missing statement in step 5?

What is the base of 1/9 to the power of 2

20 solve 2(4 x + 3) < 5 x + 21. a) { x | x < 9} b) { x | x > -5} c) { x | x > -9} d) { x | x < 5}