What point on the number line below represents the opposite of -4

Tom had a total of $220 and he spent $35 on a basketball ticket . what percent of his money did he have left?

The lengths of all sides of a triangle are integers when measured in decimeters. one of the sides has length of 1 dm and another of 3 dm. find the perimeter of the triangle.'

Determine if the equation defines y as a function of x: 2xy = 1. yes o no