What property of real numbers does each statement demonstrate? a + (-a) = 0

What are “like terms”? why can we only add like terms?

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.

Identify the initial amount a and the growth factor b in the exponential function. a(x)=680*4.3^x