We do not see the figure. Yet we know line AE is parallel to line BC. THerefore, angle ABC must equal 90 degrees. From algebra we can figure from the given facts the values of X and Y. 90 = X + 15 .= Y - 15. SO, X = 105 degrees and Y = 75 degrees

We do not see the figure. Yet we know line AE is parallel to line BC. THerefore, angle ABC must equal 90 degrees. From algebra we can figure from the given facts the values of X and Y. 90 = X + 15 .= Y - 15. SO, X = 105 degrees and Y = 75 degrees

12รท2(6-7+4)x2= (answer)

Emily S. is right on the money. For students new to this concept (order of operations) we teach the sentence, "Please excuse my dear aunt Sally." Each word representing an operation to be used left to right. THe only reason this is done is so we can all get the same answer...