2-3 Additional Practice Parallel Lines and Triangle Angle Sums
For Exercises 1-6, find the value of each variable.

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Gh bisects fgi. find the measure of hgi •15° •21° •10° •8°

Monitors manufactured by tsi electronics have life spans that have a normal distribution with a standard deviation of 1800 hours and a mean life span of 20,000 hours. if a monitor is selected at random, find the probability that the life span of the monitor will be more than 17,659 hours. round your answer to four decimal places.