PLEASE HELP ME! I know how to do slope. I just don't understand what they want me to do.

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

Given the two similar triangles, how do i find the missing length? if a=4, b=5, and b'=7.5 find a'

If tan2a=cot(a+60), find the value of a, where 2a is an acute angle