How do I solve this system of equations by adding, subtracting, or multiplying?
x-y=8;x+y=12

Which point is a solution to y s 4x + 5?

What is the measure of angle x? answer

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.