What is the difference between experimental and nonexperimental methods of study? Nonexperimental methods involve operational definitions, whereas experimental methods are simple observations. Nonexperimental methods result in definite results, whereas experimental methods simply give a broad perspective of the variables under study. Experimental methods have random variables, whereas nonexperimental methods have manipulated variables. Experimental methods involve the manipulation and control of variables, whereas nonexperimental methods require simple observation of the variables.

Experimental methods involve the manipulation and control of variables, whereas non experimental methods require simple observation of the variables.

Option D.

Explanation:

Non-experimental research about doesn't mean nonscientific. Non-experimental investigate implies there is an indicator variable or gathering of subjects that can't be controlled by the experimenter. Test plan, then again, takes into consideration specialists to control the indicator variable and subjects.

Non experimental research falls into three broad categories: single-variable research, correlational and quasi-experimental research, and qualitative research.

the sum of all the angles in a triangle are equal to 180

so you can add   the 3 given angles together to equal 180:

5y + 2y + 2y = 180

or since all three angles have the same letter, combine the 3 angles to equal 180:

9y = 180

a

b

d

step-by-step explanation: