I need this quick ima put the picture

Define multiplicative inverse. give an example of a number and its multiplicative inverse.

Answer pls man im trying to get out of summer school

The area of a rectangle is 10 cm^2. one side of the rectangle is x cm. express the perimeter of the rectangle in terms of x and show that this rectangle cannot have a perimeter of 12 cm. the perimeter of the rectangle in terms of x is __ cm