An observation study is where nothing changes and you record what is seen. An experimental study you have a control group and a testable group.
The answer would be: .C. The groups in an experiment are chosen at random, but not in an observational study.
Answer:
-0.4
Step-by-step explanation:
you are doing -4. so the first parenthesis -4(x+2x+1) is incorrect.
Hope this helps plz hit the crown :D
16
120 divided by 15 is 8
8 x 2 = 16
There are 16 coaches.
I dont understand that sorry
different approach:
see attachment
