Two students from aa class of 20 are chosen at random to escort a guest speaker to a presentation. The first student will introduce the speaker. The second will thank the speaker when she is done. In how many ways can the two students be chosen?

1. 1,960

2. 380

3. 240

4. 84

ou would have 12 of each

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%

the answer is "add 2y and y"

step-by-step explanation:

you need to collect the like terms first.