Carols pencil is 18 centimeters long. how many millimrters long is the pencil.

Solve 2x+y=3 x+y=5 in substitution method

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Select the correct answer from each drop-down menu. a system of equations and its solution are given below. system a complete the sentences to explain what steps were followed to obtain the system of equations below. system b to get system b, the equation in system a was replaced by the sum of that equation and times the equation. the solution to system b the same as the solution to system a.]