To evaluate the expression \( jk - k - m \) for \( j = -0.3 \), \( k = 14 \), and \( m = 9 \), we can substitute the given values into the expression.
First, calculate \( jk \):
\[ jk = (-0.3)(14) = -4.2 \]
Now substitute \( jk \), \( k \), and \( m \) into the expression:
\[ jk - k - m = -4.2 - 14 - 9 \]
Now, perform the operations step-by-step:
- Calculate \( -4.2 - 14 \):
\[ -4.2 - 14 = -18.2 \]
- Now, subtract \( 9 \):
\[ -18.2 - 9 = -27.2 \]
Thus, the final result of the expression \( jk - k - m \) is:
\[ \boxed{-27.2} \]