Find the perimeter of the polygon ABCDE. And please your show work ;)​

What is the missing constant term in the perfect square that starts with x^2 -20x

Money off coupons have been circulated to 300 households. only 2/5 of these were redeemed (used) in the local supermarket to get a free shampoo. what fraction of coupons were unused? (ps: write how you got the answer)

What is the name of a polygon that has four congruent sides and theses angle measures 60,120,60,120?