Which situation can be represented by a true proportion?

A: a store charged $20 for 2 shirts and charged $25 for 3 shirts

B: an alarm clock beeped 7 times in 6 seconds and beeped 14 times in 12 seconds

C: a car used 3 gallons of gas to drive 72 miles on a highway and used 4 gallons of gas to drive 72 miles in town

D: a signal light flashed yellow 7 times in 28 seconds and flashed red 5 times in 35 seconds.

plz help me

step-by-step explanation:

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step-by-step explanation:

1^3 + 2^3 + 3^3 +4^3 = (1+2+3+4)^2

step-by-step explanation:

i am only able to answer the first part. i am not sure about the second part. sorry

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%