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3.4a=57.8 what is the the value of a

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

Jessica is organizing a guided tour of the rain forest. the average profit per person that the touring company makes is given by the rational expression 18x+35/x, where x is the number of people going on the tour. what does the numerator of this rational expression represents?