Answer:
1. siblings + 1
2. numberOfPizzas * pizzaCost
3. alienGreeting + alienGreeting2
4. color1 === color2
5. value1 - value2
6. console.log(gradeAverage === gradeAverage2)
7. numberToString + numberToString2
8. numberOfStudents / numberOfClassrooms
9. console.log(carSpeed === truckSpeed)
