Which of the following demonstrates how the first 21 (on the left side of the triangle) is calculated using the combination pattern?

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

What are the domain and range of the function f(x)=2^x+1

25 ! i need asap! ! ill mark brainliest!