Answer: m∠
![E=74\°](https://img.qammunity.org/2020/formulas/mathematics/high-school/9154lwi4s2jhoicvowav8tj95a22xfnnk8.png)
Explanation:
1. By definition, the adjacent angles of a parallelogram are supplementary, they add up 180 degrees. Therefore, in the given parallelogram:
![O+M=180](https://img.qammunity.org/2020/formulas/mathematics/high-school/iklobm91oq61t953dx0hwsy7panqkv74sn.png)
![3x+1+2x+4=180](https://img.qammunity.org/2020/formulas/mathematics/high-school/u5vt2d0vmh28ql30om04kx0ohvw2brsl20.png)
2. Then, you must solve for x, as following:
![5x+5=180](https://img.qammunity.org/2020/formulas/mathematics/high-school/hyf4fplf3xiqrosqafqb6cenuxd1x9ngps.png)
![5x=175\\x=35](https://img.qammunity.org/2020/formulas/mathematics/high-school/9bg71dpbqddiroyewcviprd8uc5x2odb3e.png)
3. Substitute the value of x obtained into
to calculate the angle M:
![2x+4=2(35)+4=74](https://img.qammunity.org/2020/formulas/mathematics/high-school/uwz0vbfvm59f5jpf4mriwuu6dvo0opsj49.png)
Then:
m∠
![M=74\°](https://img.qammunity.org/2020/formulas/mathematics/high-school/3uxxa2dp4b0pt1tjcy0jqckxbbpoi6c3qa.png)
4. By definition the opposite angles of a parallelogram are equal, therefore:
![E=M\\E=74\°](https://img.qammunity.org/2020/formulas/mathematics/high-school/losurb1kioqmc8zljdh143dh42b4jlkou1.png)