I don't know what ur supposed to do but if u add them it equals 31.9 sorry if that's not what you have to do
Answer:
A prospective study
Step-by-step explanation:
A prospective study watches for outcomes, such as the development of a disease (in this case cancer). It also usually involves taking a group of subjects and watching them over a long period of time. The outcome of interest should be common between them (whether certain smoking habits lead to the development of cancer in British doctors).
7x-5x=16
2x=16
x=8
so 7*8=56
5*8=40
56:40
56-40=16
0.5 Is the answer You are looking for hope it helped you