HELP ME PLEASE with this math question

18.9c - 11.2d + 9.3f

Step-by-step explanation:

First, write the equation as adding all the parentheses together like so:

(9.7c - 1.9d) + (9.2c + 1.1f) + (8.2f - 9.3d)

Remove the parentheses:

9.7c - 1.9d + 9.2c + 1.1f + 8.2f - 9.3d

Collect like terms (9.7c and + 9.2c):

18.9c - 1.9d + 1.1f + 8.2f - 9.3d

Collect like terms again (1.9d and - 9.3d):

18.9c - 11.2d + 1.1f + 8.2f

Collect like terms again (1.1f + 8.2f)

18.9c - 11.2d + 9.3f

Hope this helped!

step-by-step explanation:

a and d