In a computer-generated study, two groups are given two different questionnaires. The computer test is not monitored, the questionnaires are randomly assigned, and the test takers are anonymous. What is the most accurate description of this study? A. single-blind experiment
B. double-blind experiment
C. observation
D. experiment

(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 .

Which one ? is the answer and how to find this answer

Which of the points a(6, 2), b(0, 0), c(3, 2), d(−12, 8), e(−12, −8) belong to the graph of direct variation y= 2/3 x?