### Home > CCA2 > Chapter 1 > Lesson 1.1.1 > Problem 1-5

1-5.

Angelica is working with function machines. She has the two machines *.* She wants to put them in order so that the output of the first machine becomes the input of the second. She wants to use a beginning input of 6. Homework Help ✎

In what order must she put the machines to get a final output of 5?

Try substituting 6 for

*x*in*g*(*x*) and then input the result into*h*(*x*). If that does not work, switch the order.Substitute 6 for each

*x*.Simplify.

Substitute the output of the first function for

*x*in the second function.The output needs to be 5.

Is it possible for her to get a final output of −5? If so, show how she could do that. If not, explain why not.

See above (original incorrect solution).