Which of the following equations are true? Select all that apply.
2

You paint a 1/2 of a wall in 1/4 hour. how long will it take you to paint one wall

Out of $20$ creepy-crawly creatures in a room, $80\%$ are flies and $20\%$ are spiders. if $s\%$ of the total legs belong to spiders, what is $s$?

Plz hurry evaluate the expression a+b where a=8 and b=19