11. Justify the rule for the square of a binomial, (a + b)2 = a² + 2ab + b2. Then use it to expand (2x' + 6y)

The sum of two numbers is 86, and their difference is 20. find the two numbers

The table shows the balance of a money market account over time. write a function that represents the balance y (in dollars) after t years.

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?