Respuesta :
Step-by-step explanation:
to fine the average add all the numbers and divide the 5
18+12+11+10+12/5 =53.4
x would be 21 because 18+12+11+10+21 divided by 6 is 12!
Step-by-step explanation:
to fine the average add all the numbers and divide the 5
18+12+11+10+12/5 =53.4