When Kayden commutes to work, the amount of time it takes him to arrive is normally distributed with a mean of 54 minutes and a standard deviation of 4 minutes. Using the empirical rule, determine the interval that represents the middle 99.7% of his commute times.

Find the root(s) of f (x) = (x- 6)2(x + 2)2.

(50 ) mrs. julien’s and mrs. castillejo’s classes are selling cookie dough for a school fundraiser. customers can buy packages of macadamia nut chip cookie dough and packages of triple chocolate cookie dough. mrs. julien’s class sold 25 packages of macadamia nut chip cookie dough and 30 packages of triple chocolate cookie dough for a total of $221.25. mrs. castillejo’s class sold 5 packages of macadamia nut chip cookie dough and 45 packages of triple chocolate cookie dough for a total of $191.25. (a) write the system of equations that model the problem. be sure to explain which equation represents which situation. (b) find the cost of each type of cookie. show your work. (c) explain which method you used to solve the system and why you chose that method.

Aline with a slope of -7 passes through the points (u,0) and (8,-7) what is the value of u?