Wanting to study the effect of exercise on preventing the common cold, a researcher collects 500 test subjects and randomly assigns them to a treatment group instructed to exercise and a control group instructed to not exercise. He later records the number of colds for each group. This is an example of: Group of answer choices linear regression independence an observational study an experiment

Which value of c would make he following expression completely factored? 8x+cy

(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 .

Aline passes through 3,7 and 6,9 what equation represents the line