I need help and I'm in 5th grade

Triangle inequality theorem state if each set of three numbers can be the lengths of the sides of a triangle. 1. 9, 8, 22. 2. 5,10,12. 3. 7,10,22. 4. 4,11,12. 5. 11,9,10. 6. 10,4,19. 7. 3,12,10. 8. 4,3,2. 9. 6,5,13. 10. 7,12,20. me .

For the equations below which statement is true ? -2x=14 6x=-42

What is the solution to the equation? k/6.4=8.7 2.3 5.568 15.1 55.68