50 points in this figure, the horizontal lines are parallel, and ab=bc=cd. find kl and ff. i need an explanation and all work shown.

AB=BC=CD together with the fact the horizontal lines are parallel implies that HG=GF=FE (can be proved using triangle similarity).  So knowing FE=5.1 implies FG=5.1

Since we now know that the horizontal lines are equidistant, it means that ML=LK=KJ (same argument as above). Therefore KL=7.6.

Let me know if you have questions!

no, x cannot be the same number. in all of them, x is 1. for one input there is another output. g is not a function

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