Lily receives 30 messages on her cell phone. of those messages,1/5 are picture messages and 7/8 of the remainder are text messages. how many text messages does she receive?

Which expression do you get when you eliminate the negative exponents of 4a^2 b^216a^-3 b

3x + 4y = 5 x- 3y = -7 solve by substitution

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.