Anthony saves $7 each week in how many weeks will he have saved at least $40?

Erinn wrote the equation –5x + 4y = 32 to represent her hourly wage (y) and how this wage has changed during each year that she worked at a company (x). what is the rate of change in erinn's hourly wage per year?

If set d is not the empty set but is a subset of set e, then which of the following is true? d ∩ e = d d ∩ e = e d ∩ e = ∅

Two years ago a man was six times as old as his daughter. in 18 years he will be twice as old as his daughter. determine their present ages.