Write 2 examples of systems for each condition relative to the solution by elimination. • Adding or subtracting equations will eliminate one of the variables.
• You need to multiply one of the equations by an integer before you add or subtract.
• You need to multiply both of the equations by an integer (or one equation by a fraction) before you add or subtract.

You were told that the amount of time lapsed between consecutive trades on the new york stock exchange followed a normal distribution with a mean of 15 seconds. you were also told that the probability that the time lapsed between two consecutive trades to fall between 16 to 17 seconds was 13%. the probability that the time lapsed between two consecutive trades would fall below 13 seconds was 7%. what is the probability that the time lapsed between two consecutive trades will be between 14 and 15 seconds?