Astudent entering a doctoral program in educational psychology is required to select two courses from the list of courses provided as part of his or her program.
(a) list all possible two-course selections.
(b) comment on the likelihood that
epr 602 and epr 684
epr 602 and epr 684 will be selected.
epr 622 educational research planning and interpretation
epr 664 nonparametric statistic
epr 602 interpretive methods in educational research
epr 652 theory of measurements
epr 684 research in child development

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step-by-step explanation:

answer: a video game has three difficulty levels: easy, medium, and expert. the game's scoring works in such a way that a player has to score a fixed number of points to advance to the next level, and then the scoring starts over. the total score needed to clear all three difficulty levels is 7,500. two times the number of points needed to clear the easy level is 500 more than the number of points needed to clear the medium level. twice the number of points needed to clear the medium difficulty level is 1,500 more than the number of points needed to clear the expert level. if x, y, and z represent the easy, medium, and expert levels, respectively, and a is the coefficient matrix of the system of equations modeling this situation, identify the inverse matrix, a-1, and the solution matrix, x, of the system of equations.

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step-by-step explanation:

2x + 8

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