En las carreras de caballos un espectador apostó a tres de las carreras y los resultados fueron los siguientes: en la primera perdió 350 dólares, en la segunda perdió 600 dólares y en la tercera ganó 850 dólares. ¿ Cuánto dinero logró perder o ganar el espectador?

Henry is an avid reader, he devours 90 pages in half an hour how many pages has henry read per minute?

Parabolas y=−2x^2 and y=2x^2 +k intersect at points a and b that are in the third and the fourth quadrants respectively. find k if length of the segment ab is 5.

(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.