Which one of the following statements can be true if function f has the surjection property but can never be true if the function f has the injection property? a. The function f can have the same output for more than one input.
b. If two elements in the domain of function f are equal, then their images in the co-domain of f are equal.
c. The function f can have the same input for more than one output.
d. If two elements in the co-domain of the function f are equal, then their preimages in the domain of f are also equal.

Given the numbers c = –3 and d = 4, which statement is true? a. |–c| = 3 and |–d| = –4 b. |–c| = 3 and –|d| = –4 c. –|c| = –4 and –|d| = 3 d. |–c| = 3 and –|d| = 4

Agroup of student volunteers participates in a study designed to assess several behavioral interventions for improving output in a repetitive task. prior to the beginning of the study, all volunteers unknowingly observed, and their output is measured. at the beginning of the study, prior to any intervention, the volunteers perform the same task under the observation of a study administrator, and their overall output increases. which of the following terms describes this phenomenon? a. simpson's paradox b. hawthorne effect are d. novelty effect d. pygmalion effect e. observer-expectancy effect

25 ! what is the value of x? enter your answer in the box. x =