Simplify (3x - 1)(3x + 1) - (2x + 7)(2x - 7)

Please help I need to review for my test tomorrow

Asquare parking lot has 6,400 square meters what is the length in meters

An architect is designing a water fountain for a park she uses the given function to model the water jet flowing from the fountain nozzles where h(x) gives the height of the water jugs in feet x feet from the starting point h(x)=-1/20x+x+15

Seymour is twice as old as cassandra. if 16 is added to cassandra’s age and 16 is subtracted from seymour’s age, their ages become equal. what are their present ages? show !