We are asked to determine the speed of a person. The average speed is defined as the distance over time. Therefore, the speed is:
![v=(d)/(t)](https://img.qammunity.org/2023/formulas/mathematics/college/7bvf02ex7prlyl84jiizv8vikm7s8zddn1.png)
Where "d" is the distance and "t" is time. Replacing the values:
![v=(35miles+17miles)/(1hour)](https://img.qammunity.org/2023/formulas/physics/college/6a170quead1y5xbin3ty06o4zlha3zzbcw.png)
Solving the operations:
![v=52mph](https://img.qammunity.org/2023/formulas/physics/college/a2cje4qwvwdqno1087a55e8qfmu9r036ei.png)
Therefore, the speed is 52 miles per hour.