![\"\"](\"/userfiles/image/steps_images/step1.JPG\")
The given function f(x) = 6x + 7.
\To find the value of function f(r ![\"\"](\"http://www.mathskey.com/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=90a2dffa4cf28836c23bfcd658a94d29.png\")
2) substitute ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=9e2f0dd362304d94cc1901de236728f4.png\")
in above function.
f(r 2) = 6(r 2) + 7
= 6(r) 6(2) + 7 (Distribute 6)
= 6r 12 + 7 (Multiply: 6(r) = 6r and 6(2) = 12)
= 6r 5 (Add: 12 + 7 = 5)![\"\"](\"/userfiles/image/steps_images/solution.JPG\")
The value of f(r 2) = 6r 5.