Why is .9 repeating not equal to one.

1/3=.
1/3*3=.*3
1=.

my math teacher says this is incorrect why is this? pls .

Because infedecimals. Basically 1 -.99999 Is a number so close to zero it is impossible to define. If this were infanct the case however and a number existed that was not 0 and not 0 it would wreck mathematics so infedecimals exist only theoretically. So .999... Is equal to 1 practically but not theoretically.

Step-by-step explanation:i agree with her

x is b in classifying each side. given a = 5 and c = 80, b = 79.8436

rounded to the nearest hundreth would make b = 79.84