A equação do plano que passa pelos pontos A = ( 1, 2, 3), B = (2, 3, 1), C = ( 3, 1, 2) é. A) x + 2y - z + 1 = 0
B) x + y + z = 0
C) - x - 2y - z - 1 = 0
D) x + 2y - 1 = 0
E) nenhuma das alternativas anteriores

What are the measures of ∠a, ∠b, ∠c and ∠d? explain how to find each of the angle measure.

It took alice 5 5/6 hours to drive to her grandparents' house for . on the way home, she ran into traffic and it took her 7 3/8 hours. how much longer did the return trip take? write your answer as a proper fraction or mixed number in simplest form. the trip home took __hours longer. ?

Acoffee shop orders at most $3,500 worth of coffee and tea. the shop needs to make a profit of at least $1,900 on the order. the possible combinations of coffee and tea for this order are given by this system of inequalities, where c = pounds of coffee and t = pounds of tea: 6c + 13t ≤ 3,500 3.50c + 4t ≥ 1,900 which graph's shaded region represents the possible combinations of coffee and tea for this order?