Question

This is for an exam please help IM LITERALLY GIVING YOU ALL OF MY POINTS!!!

Look at the question and the student work below. In complete sentences, describe the mistake the student made and explain how to answer the question properly. Be sure to include a description of the algebraic steps required to solve for x and find the correct measure of the indicated angle.

Answer 1

Which class are you in presently

Answer 2

The equations should have been added up to equal 180 instead of being set to equal each other. The two are supplementary angles, which can be seen due the rule that a pair of interior angles on the same side of the transversal is supplementary. To fix this issue from the work that they did, they should subtract the 140 from 180, so the correct measure of DKH is actually 40 degrees.

Explanation: