Of course I'll help.
Answer:
The answer would be m + 11.7
Explanation:
1) First, you have to Remove the parentheses.
![3.1 + 8.6 + m](https://img.qammunity.org/2022/formulas/mathematics/high-school/87hhywpnrq2euyux5aokzx9sphyap32y6x.png)
2) then, you have to collect like terms for the equation.
![m + (3.1 + 8.6)](https://img.qammunity.org/2022/formulas/mathematics/high-school/7ua8gddxca98sd27kncbjim2iigzla3ryu.png)
3) Now, Simplify what's insides the parentheses which is 3.1 + 8.6 and its equal to 11.7.
![m + 11.7](https://img.qammunity.org/2022/formulas/mathematics/high-school/hvhizhz39hpsf36mll3g8qgnim5oqfn5bm.png)
so, therefor, The answer is m + 11.7
hope it helps.