A mountain on a tropical island experiences changes in its height due to volcanic activity. Its current height is 2,773 meters, which is 6% shorter than it was when the mountain was last measured. How tall was it then?

Solve for x and y: 217x + 131y = 913; 131x + 217y = 827

Find the sixth term of the following geometric sequence.

Megan and desmond each add the same amount of water to their aquarium megan makes 5 ml of chemical solution with every gallon of water for her aquarium desmond mixed 8 ml of chemical solution for every 2 gallon of the water for his aquarium.