A computer repair company charges an initial fee plus $40 per hour for repair work. The total cost was for 3 hours of working. Assume the relationship is linear. Find and
interpret the rate of change and the initial value.

120

Step-by-step explanation: This answer is 120 because you multiply the three hours by the $40 you earn an hour and you get your product.

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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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