A right triangle has legs of 5 ft and 6 ft. What is the length of the hypotenuse? ft. A. 7.8 B. 3.3 C. 11.0 D. 1.0

How do i do this? i don’t understand

The table below represents the displacement of a fish from its reef as a function of time: time (hours) x displacement from reef (feet) y 0 4 1 64 2 124 3 184 4 244 part a: what is the y-intercept of the function, and what does this tell you about the fish? (4 points) part b: calculate the average rate of change of the function represented by the table between x = 1 to x = 3 hours, and tell what the average rate represents. (4 points) part c: what would be the domain of the function if the fish continued to swim at this rate until it traveled 724 feet from the reef? (2 points)

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