\
\
![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/step1.JPG\")
The expression is ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=81ae14fac7fb7864ec737a8419c9f087.png\")
.
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=e8f85f31c328e80ffa8ecbd45812c625.png\")
(Substitute 12.8 for x and 4 for y) \ \
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=9cb3f7bfbb06b93542219ae8b09f29d3.png\")
(Subtract: ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=35785c61cf7d3163bb5c9ec792a1392f.png\")
)
The value of expression is 8.8.![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/solution.JPG\")
The answer is G.
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