To distribute the minus sign in the expression \(-6.3y - (-10z - 0.3)\), we need to change the signs of the terms inside the parentheses:
- The term \(-10z\) becomes \(+10z\).
- The term \(-0.3\) becomes \(+0.3\).
So, the expression becomes:
\[ -6.3y + 10z + 0.3 \]
Thus, the equivalent expression is:
\[ -6.3y + 10z + 0.3 \]