Find all values of x satisfying the inequality -11 \(\leq\) 4 - 3x \(\leq\) 28
What is the n-th term of the sequence 2, 6, 12, 20...?
If the binary operation \(\ast\) is defined by m \(\ast\) n = mn + m + n for any real number m and n, find the identity of the elements under this operation
