42 of the 150 employees at carlos car repair wear contact lenses. what percent of the employees wear contact lenses?
show the work (use proportion)

so you need to find the percentage of 42/150

first, we need to simplify the question to solve the problem more easier.

42/150 ÷ 2 = 21/75

21/75 ÷ 3 = 7/25

42/150 = 7/25

to make it into a percent, you need to divide 7 by 25 because 25 is the divisor.

7 ÷ 25 = 0.28

and we need to move the decimal twice to the right. the answer is= 28%

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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