Find the percent of each number 60% of 250

Select all the correct answers. what is 221,000,000,000,000,000,000 expressed in scientific notation?

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

How do you solving the solution of each system using elimination?