What is 564x + 7y -6 = ??

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

For the equations below which statement is true ?

Which shows the correct substitution of the values a,b and c from the equation 1=-2x+3x^2+1