Answer:
51/2, also known as 25 1/2
Explanation:
Each = Multiply.
If there's 17 students, they all give 1 1/2 minute speech, then you multiply to get the minutes of how long it will take.
1. Convert 1 1/2 to improper.
![17*(1*2+1)/(2)](https://img.qammunity.org/2022/formulas/mathematics/college/12ox2hnxd6fjhcra4w90hljdkbf8tf92x2.png)
2. Simplify 1 × 2 = 2.
![17*(2+1)/(2)](https://img.qammunity.org/2022/formulas/mathematics/college/b8t7sh35x6z0qc6e0atcnvg6unybu5crop.png)
3. Simplify 2 + 1 = 3
![17*(3)/(2)](https://img.qammunity.org/2022/formulas/mathematics/college/qqe9qj5n1uctq0pb64iasgomkd9dwr0jen.png)
4. Add it in one equation. (Since 17 = 17/1, it equals to 17*3/2, shown below)
![(17*3)/(2)](https://img.qammunity.org/2022/formulas/mathematics/college/umbjupp723ha3djgvsbbgeykwnth37s2s4.png)
5. Simplify 17 × 3 = 51.
![(51)/(2)](https://img.qammunity.org/2022/formulas/mathematics/college/vpyq1iwzo3dsdnqlwcq1ax3bv9la6rz2k3.png)
Mixed Number =
![25(1)/(2)](https://img.qammunity.org/2022/formulas/mathematics/college/7wr9py4414bi8vee1aiolcf8qs47hzky08.png)