Which system of equations below has infinitely many solutions? a) y = –3x + 4 and y = –3x – 4 b) y = –3x + 4 and 3y = –9x + 12 c) y = –3x + 4 and y = -1/3+ 4 d) y = –3x + 4 and y = –6x + 8

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43lbs of tomatos cost $387. how much would 41lbs cost

3.17 scores on stats final. below are final exam scores of 20 introductory statistics students. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 57, 66, 69, 71, 72, 73, 74, 77, 78, 78, 79, 79, 81, 81, 82, 83, 83, 88, 89, 94 (a) the mean score is 77.7 points. with a standard deviation of 8.44 points. use this information to determine if the scores approximately follow the 68-95-99.7% rule. (b) do these data appear to follow a normal distribution? explain your reasoning using the graphs provided below.