Rozwiąż równanie ax-2x=4a-1
a/ z niewiadomą x i parametrem a
b/ z niewiadomą a i parametrem x

Dla jakich wartości paramatru k miejsce zerowe funkcji f należy do przedziału <-2;2>
a/ f(x)=-3+1-6k
b/f(x)=(x-k)²-(x+k)²+k2, k≠0

Sophia wrote an equation to represent the revenue of a movie theater for one day. she let x represent the number of child tickets sold and y represents the nunver of adult tickets sold. if a child ticket cost $4, an adult ticket cost $6, and the total revenue for the daybwas $420, which equation could sophia use to represent the number of chikd and adult tickets that were sold?