In a BIP problem with 2 mutually exclusive alternatives, x1 and x2, the following constraint needs to be added to the formulation if one alternative must be chosen: A. x1 + x2 < 1
B. x1 + x2 = 1
C. x1 - x2 < 1
D. x1 - x2 = 1
E. None of the above

Acompany recorded a check in its accounting records as $87. however, the check was actually written for $78 and it cleared the bank as $78. what adjustment is needed to the personal statement? a. decrease by $9 b. increase by $9 c. decrease by $18 d. increase by $9

4.     chef a says that broth should be brought to a boil. chef b says that broth should be kept at an even, gentle simmer. which chef is correct? a. neither chef is correct. b. chef a is correct. c. both chefs are correct. d. chef b is correct. student c   incorrect which is right answer

How much is a 2019 tesla? ? exact price trying to buy for my 6 year old sister