Plz show work, NEED HELP FAST PLZ

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 f(x)=-x^2+6x-1 and g(x)=3x^2-4x-1,find(f+g)(x)

How many grams the dog will eat in 3 days?