The answer to this system of equations

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

Abiologist is recording the loss of fish in a pond. he notes the number of fish, f, in the pond on june 1. on july 1 there were 63 fish in the pond, which is 52 fewer fish than were in the pond on june 1. which equation represents this situation? a. f – 52 = 63 b. f – 63 = 52 c. 63 – f = 52 d. f – 63 = –52

At the newest animated movie, for every 9 children, there are 4 adults. there are a total of 39 children and adults at the movie.