The expression "81 a b" seems incomplete or unclear. If you're asking whether 81 is equal to a variable "b," it depends on the context in which these variables are defined. If "a" and "b" are defined to equal 81, then yes, otherwise, more information is needed to provide a definitive answer.
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Yes. 81/100 = 81%
81% or B-
81% or B-
If a, b, c, and d are positive integers that add up to 20 they each must be less than 20. If abcd=81 then a, b, c, and d must be factors of 81. The factors of 81 are 1,3,9 then 27, so there is no solution to this problem.
in my school it a b-