Why should you avoid contractions and slang in formal essay?

There are two kids that used to hang out together what is the one with the Hat's name in Hocus Pocus

Read the following excerpt from the poem "Grass" by Carl Sandburg: Pile the bodies high at Austerlitz and Waterloo. Shovel them under and let me work - I am the grass; I cover all.

What are some off Broadway musicals

What type of evidence does Minow use to develop the idea that what is on television lacks value?

How would the novel be different if it were told from Jems perspective

What is the root word in egomania

What is the balance after the transfer on January 17? $242.50 $15.00 $33.00 $40.00

What is the purpose of using the CARS Test

What does affinity mean

How could the sentence below be improved? I thought his song was great, even though I don't usually like country music.