Lara chooses a number less then 20 she divided it by 2 and then adds 6 she then divides this result by 3 her answer is 4.5 what was the number she started with ?

For questions like this, we will work backward to arrive at the initial number.

Start with the final answer. The answer is 4.5.

[divided by 3,] so we will multiply by 3
4.5 x 3 = 13.5

[Add 6], so we will subtract 6
13.5 - 6 = 7.5

[divided by 2], so we will multiply by 2
7.5 x 2 = 15


The initial number is 15.

They can give people the gum

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.