Help me please?

Question

Answer 1

 The price of the sneakers is s. 

 The sales tax on the price of sneakers is 0.085s. 

 The total amount to be paid is 1.085s.

Answer 2

Price + Tax = s + 0.085s

i.e. (1 + 0.085)s

so, 1.085s

Hence, multiply by 1.085

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Answer 3

s + 0.085s = 1.085s = Total Amount including tax