(4x-16) and (5x+7) of a triangle

What's the difference between: x≥0 and nonnegative integer. ?

Adam plans to choose a video game from the section of the store where everything is 75% off. he writes the expression d-0.75d to find the sale price of the game if the original price is d dollars. gena correctly writes another expression, 0.25d, that will also find the sale price of the game if the original price is d dollars. use the drop down menus to explain each part of adams and rena's expression

If m 17 27 90 63 ** picture is attached