It cost Andrew $21 to buy 7 binders. At this price, how much would it cost him to buy 4 binders?

Write an expression that has three terms and simplifies to 4x - 7. identify the coefficient(s) and constant(s) in your expression

Alicia puts $400 in a bank account. each year the account earns 5% simple interest. how much money will be in her bank account in six months?

Maria walks a round trip of 0.75 mile to school every day. how many miles will she walk in 4.5 days