Manuel has four pieces of bubble gum. His friend gives him nine more pieces. By what percent has Manuel’s amount of bubble gum charged?

Which of the following choices gives you a slope of 3?

Aresearcher believes increased perceived control influence the well-being of residents at a nursing home. to test this , she allowed one group of residents to have control over their daily lies, (where to eat etc) . the other group of 5 residents had these deceisions made by staff. the resident's feelings of well-being were measured on a 10 point scale at the end of a one month trial period. is there a difference on well-being?

If the average of x,y and z is 15 what is their sum