A high school choir had a car wash to raise money, the number of trucks washed was 5 fewer than twice the number of cars washed. if they washed a total of 34 trucks and cars, how many trucks did they wash? PLEASE HELP ME THIS QUESTION IS SO CONFUSING

Period is the time it takes for one “cycle” to complete. in the parent sine function, period is 2*pi since sin(0) = 0, sin(pi/2) = 1, sin(pi) = 0, sin(3pi/2) = -1, and sin(2pi) = 0. at that point, the sequence repeats itself. i’m not sure if your graph is similar to the sine function since you didn’t provide a picture, but you can find the period by looking at a graph.