Kaylee needed to write the equation of an exponential function from points on the graph of the function. To determine the value of b, Kaylee chose the ordered pairs (1, 7) and (3, 42) and divided 42 by 7. She determined that the value of b was 6. What error did Kaylee make? Complete the explanation. The value Kaylee found is not the constant ratio of successive values. She should use ordered pairs with x-values that differ by

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Answer is in the photo. I couldn't attach it here, but uploaded it to a file hosting. link below! Good Luck!

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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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the answer is 13 cm