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for question 18 how do get the answer?

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Abidemiokinidn

The total number of ships on both days 2x + 5

The total in all the 5 days is 7x +2

Sum of functions

From the given table;

  • Total number of ships on Monday  = x - 4
  • Total number of ship on Tuesday = x + 9

The total number of ships on both days = x - 4 + x + 9

The total number of ships on both days 2x + 5

b) To get the total for all the days;

Total for all days = 2x + 5 + 2x + 3x - 7 + 4

Total for all days = 7x + 2

Hence the total in all the 5 days is 7x +2

learn more on addition of functions here: https://brainly.com/question/2475734

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