If 9999 = 4, 8888 = 8, 1816 = 6, 1212 = 0, then 1919 =?

Rewrite the hyperbolic equation 4y^2 -9x^2 +54x-8y-113=0

Which expression is equivalent to the expression shown?

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