Explain how an annual salary of $50,000 in 1970 could have more purchasing power than an annual salary of $200,000 in 2007.

Isee the amount was $90.00 then reduced to $75.00 , what is the percent ?

Suppose a gym membership has an initial enrollment fee of $75 and then a fee of $29 a month. which equation models the cost, c, of the gym membership for m months?

Joe has a rectangular chicken coop. the length of the coop is 4 feet less than twice the width. the area of the chicken coop is 510 square feet. what is the length of the chicken coup?