What is another way to show 3+3+3+3+3+3?

Maria found the least common multiple of 6 and 15. her work is shown below. multiples of 6: 6, 12, 18, 24, 30, 36, 42, 48, 54, 60, . . multiples of 15: 15, 30, 45, 60, . . the least common multiple is 60. what is maria's error?

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The graph shows the amount of money noah earned based on the number of lawns he cut. which list shows the dependent quantities in the graph?