What is the value of the expression when a = 2, b =6 and c = 5? 7b-4a+6c/2 a 22 b36 c 49 d 65

Astudy was interested in determining if eating milk chocolate lowered someone's cholesterol levels.ten people's cholesterol was measured. then, each of these individuals were told to eat 100g of milk chocolate every day and to eat as they normally did. after two weeks, their cholesterol levels were measured again. is there evidence to support that their cholesterol levels went down? how should we write the alternative hypothesis? (mud = the population mean difference= before - after)a. ha: mud = 0b. ha: mud > 0c. ha: mud < 0d. ha: mud does not equal 0

Evaluate each expression. determine if the final simplified form of the expression is positive or negative -42 (-4)2 42

Iknow the answer but the calculator doesn't seem to give the right one