A math textbook is 1 1/4 inches thick. How many books will fit on a shelf that is 30 inches wide?

Gabrielle's age is two times mikhail's age. the sum of their ages is 84. what is mikhail's age?

Marquise has 200 meters of fencing to build a rectangular garden. the garden's area (in square meters) as a function of the garden's width w w (in meters) is modeled by: a ( w ) = − w 2 + 1 0 0 w a(w)=−w 2 +100w what side width will produce the maximum garden area? meters

What is the perimeter of an isosceles triangle with each leg measuring 2x+3 and the base measuring 6x-2?