Cho văn phạm phi ngữ cảnh với tập quy tắc sinh là R = { I->aIa, I->aa/a∈∑={a1,a2,a...,a3}.

tìm ngôn ngữ do văn phạm sinh ra. Hãy chỉ ra dẫn xuất đầy đủ của xâu ω=a3a2a3a1a2a2a1a3a2a3 trong văn phạm trên

Si la base de un triángulo isósceles mide 70 m y el ángulo opuesto a ésta mide 58°; entonces ¿cuánto mide la altura de dicho triángulo? a) 21.87 m. b) 40.01 m. c) 43.74 m. d) 63.14 m.

(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.

y=2x−1 5x−4y=1 is (1,1)(1,1) a solution of the system?