4x + 5y = 22
7x - 3y = -32

Plz which expression is equivalent to the expression below?

Find the roots of the equation below. x^2 - 6 + 9 = 0

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.