1. solve, using linear combination.
3x – y = 4
2x + y = 6
2. what is the y-coordinate of the solution to the system of equations?
5x - y = 25
4x + 3y = 1
3 . what is the x-coordinate of the solution to the system of equations?
x = y + 16
y + 4x = 9
4 . graph the system of equations using technology.
what is the x-coordinate of the solution?
round to the nearest hundredth.
-6x - 7y = 8
x + 5y = 11

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.