Amodel of a car was built with a ratio of
2 in : 1 ft. if the model car is 28.5 in,
how long is the actual car?

14.25 feet, or 171 inches.

Step-by-step explanation:

there are six 2 inches in 1 foot (or 12 inches), so you can multiply

28.5 inches * 6 = 171 inches.  Then divide 171 by 12 or the original number of 28.5 inches by 2 to get 14.25 feet.

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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