A passenger jet is flying at 31250ft. The jet descends 4 ft every second Prior landing. Write an expression representing plane altitude after x seconds.

Jasmine has j bracelets. Rebecca has 5 less than twice that amount. How many bracelets does Rebecca have.

Marvins taxi service charges a fee of $3.50 and $0.30 for each mile.Write an expression to represent the total cost of m miles.

Sue has s dollars. Felipe has $28 more than sue. Write an expression to represent double the difference between their amounts.