The green figure is the original quadrilateral, ABCD. The red is the image, EFGH. You can see from the figure that they are both oriented (turned) the same way. It appears that the transformation applied was a translation. Each ordered pair has an <em>x</em>-coordinate that is 4 larger than the preimage and a <em>y</em>-coordinate that is 5 smaller than the preimage. Therefore the transformation was a translation 4 units right and 5 units down.
You have to add them, 74.365 + 9.82 = 84.185 You do it just like a normal addition problem but with decimals, the extra 5 at the end doesn’t matter just add another zero at the end of 9.820