Find an equivalent system of equations for the following system: x + 2y = 2 −4x + 4y = −8
x + 2y = 2
−4x − 2y = 10

x + 2y = 2
5x + 4y = 8

x + 2y = 2
5x − 2y = 10

x + 2y = 2
5x − 2y = −8

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.