Please help fast I don't have very long :)

What is the sum of these mixed numbers 2 1/8 + 4 3/8

In the xy-plane, if the parabola with equation passes through the point (-1, -1), which of the following must be true?

Tyler enjoys the fish so much that after his birthday his family decides to take him to a famous aquarium a tank at the aquarium is similar to his tank with the scale factor of 8 how many times greater is the volume of the tank at the aquarium than the volume of tyler tank