what is the algorithm of -7 - 12 i know the answer is negative 19 but what is the algorithm in order to get that answer if you ca help that would be great thank you :)

What term makes it inconsistent y=2x - 4

How many $20 bills do you need to have to make $280

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?