![\"\"](\"/userfiles/image/steps_images/step1.JPG\")
A man is amusician.
\He charges ![\"\"](\"http://www.mathskey.com/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=37f7c1092310df31adac224fbdc54460.png\")
for each of the first three hours he plays and ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=71f9251b942d718dbaff66cde0ebafd6.png\")
for each additional hours. \ \
Write the expression find the total amount he charges if he plays for 7 hours.
\Phrase: Sum of the (product of the charges $50 for each and first three hours) and (product of ![\"\"](\"http://www.mathskey.com/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=71f9251b942d718dbaff66cde0ebafd6.png\")
for each additional hours).
Expressions: ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=c2eaac6a97e1aa4a6365cf920d6730c5.png\")
.
Therefore, Option B is cannot suitable for the expression.
\![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/solution.JPG\")
Option B is right choice.