Kevin gave ben $4.90 in dimes and quarters. if 10 coins were quarters how many coins were dimes which equation models this problem

Candy lives in the center of town. her friend darlene lives 28 miles to the east and her friend dana lives 21 miles north. approximately how far do dana and darline live apart ?

Two numbers have a sum of -19. one number is x. what expression represents the other number?

The weight of a full steel bead tire is approximately 800 grams, while a fighter wheel weighs only 700 grams. what is the weight of each tire in pounds?