Dave was playing checkers with a friend. the ratio of games dave won was 10: 7. if dave won 80 games, how many games did his friend win?

Simplify (a/b - b/a) times (a - a^2/a+b) a - a^2/a=b is a mixed number

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

Taber invested money in an account where interest is compounded every year.he made no withdrawals or deposits. the function a(t)=525(1+0.05)^t represent the amount of money in the account after t years. how much money did taber origanally invested?