7y + 3y =

(I’m just not good at algebra I try but can someone help)

What is the square root of 45? (step by step working plz)

What is the value of x? enter your answer in the box. photo attached.

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 .