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Hi Rita, There are two errors in choice (1). First of all the discount is 20% so 0.20x dollars would be the amount of the discount not Hakeem's cost. Hakeem's cost is x - 0.20x = 0.80x dollars. Thus a possible answer might be 0.80x - 15 dollars but even that is incorrect. 0.80x - 15 dollars would be the cost if Hakeem got a 20% discount and then a further reduction of $15, but that's not what happened. First the $15 deduction is taken off so the price is reduced to x - 15 dollars. Then, since he is an early-bird shopper this price is reduced by 20%. Thus what he pays is 0.80 × (x - 15) = 0.80x - 12 dollars. I hope this helps, | ||||||||||||
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