If you want to say "Nine is less than a number k," you would write 9<K. If you're asking for an equation, e.g. "Nine less than a number k is equal to that number divided by three," you would write k - 9.
k - 5
k - 15
The formula is 2-k. The answer depends on the value of k.
3 - k
k - 6
It is simply: k-4
less than. three and ten one hundredths is less than three and fifteen one hundredths.
Algebraic expression 14 less than the quantity k times 6