Which expression shows that 11 + 7 = 5 + 13? a. (5 + 6) + 7 = 5 + (6 + 7) b. 6 + 6 + 6 = 18 c. 5 + 9 + 4 = 6 + 7 + 5 d. (11 + 4) + 3 = (5 + 7) + 6

The system of equations graphed below has how many solutions?

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?

Bill and felicia each bake cookies for a party. bill bakes 3 times as many cookies as felicia. felicia bakes 24 fewer cookies than bill. bill bakes b cookies and felicia bakes f cookies. what equation can represent this word problem