The equations in this system were added to solve for y. What is the value of y?

x + 6 y = 10. -x + 3 y = -15. Equals 9 y = -5.

A) y = Negative StartFraction 9 Over 5 EndFraction
B) y = Negative StartFraction 5 Over 9 EndFraction
C) y = StartFraction 5 Over 9 EndFraction
D) y = StartFraction 9 Over 5 EndFraction

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.