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How do i simply this expression (quadratic formula basis) on a ti-84 or normal calculator?

Noel is hoping to make a profit (in $) on the school play and has determined the function describing the profit to be f(t) = 8t – 2654, where t is the number of tickets sold. what does the number 8 tell you?

Which numbers have the same absolute value? choose all that apply. asap will mark at brainliest