Answer:
22.7
Step-by-step explanation:
They are opposites because they are both the same distance from 0 and are on different sides of 0 on a number line.
They are also opposites because when either of them is multiplied by -1, you get the other one.
![22.7*-1=-22.7](https://img.qammunity.org/2020/formulas/mathematics/middle-school/qwx30z26poq7dsctsypr21y9f2z8gfhlqu.png)
![-22.7*-1=22.7](https://img.qammunity.org/2020/formulas/mathematics/middle-school/hmlna4twvfx5dbnz6xhmciy2b1el48j2pz.png)