For the following system, if you isolated x in the second equation to use the substitution method, what expression would you substitute into the first equation? Equation 1:2x + y = 8
Equation 2:-x-3y =-12
1. 3y + 12
2. -3y + 12
3. 3y - 12
4. -3y - 12

You would substitute 2. -3y + 12 into the first equation

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.