Idon't understand, :
:
ninety-nine less than three times brandons age is thirty-one less than his age. how old is brandon?
( show work! )

Asquare has a side that measures 11 units. what is the area of a circle with a circumference that equals the perimeter of the square? use 3.14 for π, and round your answer to the nearest hundredth. 1519.76 units2 379.94 units2 616.56 units2 154.14 units2

What is the circumference of a circle with an area of 50.24 cm²?

What ratio is proportional to 18/21