Help me pls help me pls

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

Sketch one cycle if the cosine function y=2cos2theta

The value of the expression 16-^3/4 8 1/8 -6 6 1/40 1/64