### Home > CCA > Chapter 1 > Lesson 1.1.1 > Problem 1-4

1-4.

In what order must she put the machines to get a final output of

? Substitute

for each in the first function. Substitute the answer of the first

equation forin the second equation.

INCORRECT! Try Again!Substitute

into the nd equation first!

Substitute the answer of thend

equation forin the 1st equation.

CORRECT!Is it possible for her to find an input that will get a final output of

? If so, show how she could do that. If not, explain why not. See above (Try 1).