Adiver went 25.65 feet below the surface of the ocean, and then 16.5 feet further down, he then rose 12.45 feet. write and solve an expression to find the diver's new depth.

or

option (b) is correct

step-by-step explanation:

to find the solution of this system, we need to convert it into reduced row-echelon form. we have,

after applying row operations r2 -> r2/2 and r3 -> r3/3, we get,