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Mathematics 8 Online
OpenStudy (anonymous):

Let t be the time now. Write an expression for the time 2 hours ago.

OpenStudy (saifoo.khan):

t-2

OpenStudy (anonymous):

How is t expressed?

OpenStudy (anonymous):

let t be represented as military time (so 1:00PM is 1300) then 2 hours ago is t - 2000

OpenStudy (anonymous):

oops, t - 200

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