A: Technically yes. You can rename it to MixedLucky.zip , but some older versions check the file name for dependencies. It is safer to keep "File name- Mixed-Lucky-Block-Mod-Forge-1.8.9.zip" intact.
Place the .zip (or the .jar inside it) into your .minecraft/mods folder. Launch Minecraft using the Forge profile. File name- Mixed-Lucky-Block-Mod-Forge-1.8.9.zip