The roots of the quadratic function describing the relationship bewteen number of products produced and overall profit margin are x=0 and 126. The vertex is (63, 1500). The maximum profit of dollars is reached when items are produced.

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step-by-step explanation:

ok then what happened.

answer:   expression= p+p*d%

price reduction + sale price = $625

sale price: $p+$p*d%

where d% is the percentage of discount

step-by-step explanation:

original price = p

price went down by $150 price reduction $p*d%

sale price= $ 475

therefore the price before sale is: $625

and the expression that shows the price before sale is: p+p*d%