Answer:
1
Step-by-step explanation:
Did you mean -10? If so that is -1 and 10. 10 and 9 is not possible to answer.
-1+10=9
-1*10=-10
The correct answer is C.
An irrational number is a number that can't be expressed as a ratio or proper fraction.
A. can be written as 23/50
B. Can be written as 3 1/3
C. Cannot be written as a ratio or fraction
D. Can be written as 8/9
Since they are different people with different thoughts and knowledge giving them to choose different numbers all though two of them might choose the same number
