Madeline has 19 coins in her backpack. Some are nickels and some are quarters. The total value of the coins is $2.15. How many nickels and quarters does she have?

Draw a tape diagram to represent each situation.for some of the situations,you need to decide what to represent with a variable andre bakes 9 pans of brownies.he donates 7 pans to the school bake sale and keeps the rest to divide equally among his class of 30 students

Angles r and s are complementary. the measure of angle r is 31 degrees. which equation can be used to find angle s?

Cody was 165cm tall on the first day of school this year, which was 10% taller than he was on the first day of school last year.