Which of the following statement is true? a. the echelon form of a matrix is unique.
b. the pivot positions in a matrix depend on whether row interchanges are used in the row reduction process.
c. reducing a matrix to echelon form is called the forward phase of the row reduction process.
d. whenever a system has free variables, the solution set contains many solutions.
e. a general solution of a system is an explicit description of all solutions of the system.

c. Reducing a matrix to echelon form is called forward phase of the row reduction process.

Step-by-step explanation:

Forward Phase in Row Reduction Process: It is the process in which operations are performed to get leading entries in non-zero rows.

Backward Phase: It is the process of reducing matrix from echelon form to reduced echelon form.

sorry can't

step-by-step explanation:

i googled though and something came up but it was in science langueage not common english sooo

13

step-by-step explanation:

divide the cost of the total of sodas you bought by the cost of one soda, for example:

$24.57 divided by $1.89 is 13 which means you bought 13 sodas