Hi my school starts in a hour and I don’t know the answer pls help me Write an equation and solve to find the missing side of the heptagon below. Write just the value of the side below. Show your work.

Zoe placed colored blocks on a scale in science class. each block weighed 0.8 ounces. the total weight of all the colored blocks was 12.8 ounces. how many blocks did zoe place on the scale? write and solve an equation to find the answer.

This race was first held in 1953 on august 16th. every decade the race finishes with a festival. how many years is this?

Pls! does anybody know a shortcut for answering these types of questions in the future?