O need help with my quizz

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

Which statement about the relative areas of δabc and δxyz is true? the area of δabc > the area of δxyz the area of δabc < the area of δxyz the area of δabc = the area of δxyz more information is needed to compare.

Calculate the missing value. round the answer to on decimal place. start with 70, increase it by 21%, and end up with