Bustin bought a dvd player that was marked down from $150 to $100. find the percent of decrease

Translate the word phrase into a math expression. 15 fewer than the product of 4 and a number. (pls immediately)

Tim open up a new saving account with a $50 deposit and plant to deposit $20 per week into the same account.write an expression to represent the total amount in his savings account.

Javier bought a painting for $150. each year, the painting's value increases by a factor of 1.15. which expression gives the painting's value after 77 years?