Select all the expressions that are equivalent to 7(2 - 3n). Explain how you know each expression you select is equivalent.

1. 9 – 10n

2. 14-30

3. 14 - 21n

4. (2 - 3n).7

5. 7•2• (-3n)

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%

d will be the best answer