6. 7j - f - 8j - 9f

Answer 1

To simplify the expression 7j - f - 8j - 9f, you can combine like terms:

7j - 8j - f - 9f

= (7j - 8j) + (-f - 9f)

= -1j - 10f

So, the simplified expression is -1j - 10f.