Follow me need asap plll with both problems

Select the correct answer from each drop-down menu. a system of equations and its solution are given below. system a complete the sentences to explain what steps were followed to obtain the system of equations below. system b to get system b, the equation in system a was replaced by the sum of that equation and times the equation. the solution to system b the same as the solution to system a.]

The value of the expression 16-^3/4 8 1/8 -6 6 1/40 1/64

Add the two expressions 4.6 x -3 + -5.3 x + 9