Khhan academy let's go help me

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

Which ahows the graph of the solution set of 6x+4y< 12

Jenny earned a 77 on her most recent test jenny score is no less then 5 points greater then 4/5 of terrance’s score if t represents terrance score which inequality represents the situation