The linear function is , where x is the number of paintings and P(x) is the amount of profit.
Substitute the value of in the above equation.
.
The amount of profit is 285.
![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/step1.JPG\")
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=10c9fbb52f3afa694cce41b49c59efca.png\")
, where x is the number of paintings and P(x) is the amount of profit.![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=a41831cc809490671975bc057f26e196.png\")
in the above equation.![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=46d379e406ef70e9f1623afc259e0bd5.png\")
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=7ec177019d358ec8691a403402769290.png\")
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=db96b01f41b91d68e4e99893a237e7fd.png\")
.![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/solution.JPG\")