F) When writing an expression, what is the name for the letter in your formula? This letter can be any letter of the alphabet. For example, 6n-2, what is the
name for the "n"? (1 point)

Answer this question! 30 points and brainliest! only if you know the answer.

Write a corresponding real world problem to represent 2x - 125=400

Aswimming pool is a rectangle with semicircles on the end. the rectangle is 12 meters wide and 30 meters long. the diameter and width of the swimming pool are equal. sketch and label an overhead diagram of the swimming pool. find the area of the swimming pool floor.