Which property best justifies why the two expressions below are equivalent?
3(m + 5) = 3m + 15

Me. i can't figure out this question. give an explanation too. .

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?

What is the value of 4x to the third +4x if x is 4