Students at a high school filled out a survey the results showed that out of 640 students 331 speak more than one language how many students speak only one language

(least common multiples) the answer that i had in the 1st step was lcm of airline tickets sold=72. idk if that even matters but just in case. ! three co-workers are busy selling airline tickets over the phone. in an 8-hour day, charles can sell 8 airline tickets, ann can sell 9 airline tickets, and michelle can sell 6 airline tickets. step 2 of 2: what is the smallest number of 8-hour days needed for each of them to achieve the same number of sales? it takes charles . it takes . it takes .

2x minus y equals 6, x plus y equals negative 3

Find the domain and range of the following function f(x) = 51x - 21+ 4