Question

7n-2<=cn how to calculate the values of c and n

Answer 1

7n - 2 <= cn ..... for n

7n - 2 <= cn ---- subtract 7n from both sides
-2 <= cn - 7n
-2 <= n(c - 7)
-2 / (c - 7) <= n or n >= - (( 2/(c-7))

7n - 2 <= cn...for c --- divide both sides by n
(7n - 2) / n <= c or c >= (7n - 2) / n
I am not 100% sure on this one

Answer 2

Here you go