Can someone answer this question please answer it correctly please help me I need it

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

Julius sold five times as many computers as sam sold last year. in total, they sold 78 computers. how many computers did julius sell?

With this question substitute t=3 and t=5 to determine if the two expressions are equivalent. 4(t + 3) 4t+12 which statements are true? check all that apply. a. the value of both expressions when t =5 is 32. b. the two expressions are not equivalent. c. the value of both expressions when t=3 is 15. d. the value of both expressions when t=5 is 23. e. the two expressions are equivalent. f. the value of both expressions when t=3 is 24.