Final answer:
Millie's height is calculated using the equation 2x + 4 = 368, where x is Millie's height. After solving, we find that Millie's height is 182 cm.
Step-by-step explanation:
To calculate Millie's height given that Tim is 4cm taller than Millie and their combined heights add up to 368cm. To determine the correct equation that represents this situation, we can set x as Millie's height. Thus, Tim's height will be x + 4 cm.
Adding both their heights, we should have x (Millie's height) + (x + 4) (Tim's height) = 368 cm. Simplifying this, we get 2x + 4 = 368. This is the equation that represents the total height of Tim and Millie together. To find Millie's height, we need to solve for x in this equation.
2x + 4 = 368.
Subtracting 4 from both sides, we get 2x = 364.
Dividing both sides by 2, we get x = 182.
Therefore, Millie's height is 182 cm.