What are the solutions to the following system of equations y=x^2 + 3x-7 3x-y= -2 (3,11) and (-3,-7) (11,3) and (-3,-7) (3,11) and (-7,-3) no real solutions.

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.