Please help and look at the picture

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

Does the problem involve permutations or? combinations? do not solve. the matching section of an exam has 4 questions and 7 possible answers. in how many different ways can a student answer the 4 ? questions, if none of the answer choices can be? repeated?

Aline has a slope of negative 1/4 the past two points -5/4 and 1 what is the equation of the line