**100 POINTS WORTH** A jar contains n nickels and d dimes. There are 28 coins in the jar, and the total value of the coins is $2.10. How many nickels and how many dimes are in the jar?

Which is the equation of an ellipse with directrices at x = ±4 and foci at (2, 0) and (−2, 0)?

Plz help plz give me the answer

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