Climatologists are monitoring the sea surface tempera- ture off the coast of Nigeria. When they average the
monthly temperatures in an attempt to predict the onset
of diseases such as cholera, malaria, and dengue fever,
they can add the daily temperatures in any order. What
mathematical property does this demonstrate?

Asequence is defined recursively using the formula f(n + 1) =f(n) - 5. which sequence could be

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.

Determine whether the statement is true or false