Answer:
Temperature at Ryan's hometown will be = -21°C
Explanation:
Given:
Temperature in Wichita, Kansas = -3°C
Temperature at Ryan's hometown is 18°C colder than temperature in Wichita.
∴ Temperature at Ryan's hometown will be =
![-3\°C-18\°C=-21\°C](https://img.qammunity.org/2020/formulas/mathematics/middle-school/g9iu1gbk4i9yos0i5ehughvovnqcbnzd5y.png)
[When two negatives are summed, then they add up to give sum with a negative sign]