On the table rest 8 dominoes, as shown below. If you were to line them up in a single row, so that any two sides touching had matching numbers, what would the sum of the two end numbers be?

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A: Explanation of the answer is as follows

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A: Find the value of x.

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Q: y=. HOTE -5 fa 7 2 -1+ -2 دیا 3

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A: A system is said to be consistent if it's solution is exist.

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A: easiest way to plot the linear graph :

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Q: An+1= - 4A, +3, A, = - 4 A3 =U (Simplify your answer.)

A: