A school has a 20% sale on all headphones. With this discount, the price of headphones is $47. What was the original price of the pair of headphones?​

Initially 100 milligrams of a radioactive substance was present. after 6 hours the mass had decreased by 4%. if the rate of decay is proportional to the amount of the substance present at time t, find the amount remaining after 24 hours. (round your answer to one decimal place.)

One integer is 5 more than another. their product is 104. find the integers

Solve the equation -9p - 17 =10 a -3 b. 16 c. 18 d -16