A middle school principal has 808080 keys on her key chain to distribute to staff on the first day of school. Of these 808080 keys, 606060 open classroom doors, 404040 open the door to the teachers' lounge, and 303030 open classroom doors and the teachers' lounge. Using this information, answer each of the following questions. Let CCC be the event that a randomly selected key opens a classroom and TTT be the event that a randomly selected key opens the teachers' lounge.

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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%

it is only things thain can be deafeated

step-by-step explanation: