Does the table represent a function or not?"

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.

What does x = in this equation x+3+2x=x+5

Two times a number plus three times another number equals 4. three times the first number plus four times the other number is 7. find the numbers