Libby and Eslendy are buying Girl Scout cookies. Libby buys 2 boxes of Thin Mints and 5 boxes of S'mores for $40. Eslendy buys 4 boxes of Thin Mints and 3 boxes of
S'mores for $38. What is the cost of one box of Thin Mints and one box of S'mores?
Define the variables.
Write 2 linear equations.
Solve the system of linear equations using the Elimination method.

An office supply company conducted a survey before marketing a new paper shredder designed for home use. in the survey, 80 % of the people who tried the shredder were satisfied with it. because of this high satisfaction rate, the company decided to market the new shredder. assume that 80 % of all people are satisfied with this shredder. during a certain month, 100 customers bought this shredder. find the probability that of these 100 customers, the number who are satisfied is 69 or fewer.