There is a correlation between the scores on a national math assessment and the number of hours spent on preparing for the assessment. Which of the following statements are true? Select all that apply.
(1) A value of 2.35 could be a reasonable slope for the function equation.
(2) There is causation between the amount of time students spent preparing and their scores on the national math assessment.
(3) The correlation between the two quantities should be fairly strong to strong.
(4) Based upon the study, a student who gets more sleep before the assessment should expect a higher score.
(5) A value of r=-.88` is a reasonable measurement for the correlation coefficient of this association.

10 glasses of juice could be made with 5 carrots, 1,500 orange juice, 2,000 papaya juice.

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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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