<span>A. an observational study, since they were not assigned to their groups.</span>
The angle would be 70 degrees because 180-110=70
Answer:20
Step-by-step explanation: If u need help again: https://mathpapa.com/algebra-calculator.html
The answer would be x + x + 2 = 72. Combine like terms so that 2x + 2 = 72. 2x = 70 and x = 35.
