The operation * on the set R of real numbers is defined by x*y= x+2y+xy for all x, y e R. Find a). 2*3. b). 3*2 c). (2*3)*y d). 2*(3*y)

Which situation can be modeled by the inequality 5 + 10w ≥ 45? a. you start with $5 and save $10 a week until you have at least $45. b.you start with 5 baseball cards and purchase 10 cards every week until you have at most 45 cards. c.you start with 5 water bottles and purchases cases of 10 water bottles each until you have a total of 45 water bottles. d.you spend $5 plus $10 per week until you have less than $45.