ANYONE SMART ENOUGH TO ANSWER THIS? WILL GIVE BRAINLIEST

Using the side-splitter theorem, daniel wrote a proportion for the segment formed by luke segment de. what is ec?

Julie begins counting backwards from 1000 by 2’s and at the same time tony begins counting forward from 100 by 3’s.   if they count at the same rate, what number will they say at the same time?

If f(x) = 3x-2 and g(x) =2x+1 find (f-g)(x)