a construction company buys a certain number of boxes of nails depending on how many houses they plan to build in the year they have five boxes left over from the previous year and predict that this year they will need three boxes per house write an equation where y represents the number of boxes they need to purchase and x number of houses they plan to build

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.