What does the irrational number 1. fall?

You mean in the irrational number  circle

What is given is a system of equations. Using the 2 equations, we can solve for the values of x and y, which correspond to the prices of a strawberry smoothie and a protein shake respectively. This is shown below:

x + 4y = 25.50
3x + 2y = 24

x = 4.50
y = 5.25

Therefore, the price of a single protein shake is $5.25.