Xian plans to run 20 laps around a track. each lap is 400 yards. so far xian has to run 1680 yards around the track. what percentage of the run has xian completed.

You are cycling around europe with friends. you book into a hostel and you ask the owner what the ratio of men to women is currently staying there. there are 24 men and 6 women. what is the ratio of men to women in its simplest form?

Write 5(6x+4)-2(5x-2) in the form a(bx+c) where a,b and c integers and a> 1

At the beginning of year 1, carlos invests $600 at an annual compound interest rate of 4%. he makes no deposits to or withdrawals from the account. which explicit formula can be used to find the account's balance at the beginning of year 5? what is, the balance?