



 
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 earlybird 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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