Find the value of x pls help

Write a numerical expression that satisfies all of the following conditions. 1.)the only number used in the expression is 5 2.)at least one exponent other than 1 is used 3.)when the expression is evaluated, the answer is greater than 40 and less than 50

Describe the possible echelon forms of the standard matrix for a linear transformation t where t: set of real numbers is onto.

Astudent showed the steps below while solving the inequality |x-4|< 1 by graphing.