Is A = {(1, 5), (1, 5), (3, -8), (3, -8), (3, -8)} a function? Yes or No

So me with this math problem. find the value of x the table shows the masses of 50 eggs. mass: 40-44 eggs: 6 mass: 45-49 eggs: x mass: 50-54 eggs: 12 mass: 55-59 eggs: 10 mass: 60-64 eggs: 7 mass: 65-69 eggs: 2 you!

Which equation results from adding the equations in this system? x+6y=9 and -x+2y=-15

Fast! find the length of cu. the triangles are similar. show your work.