What is the solution to the equation 5/8(4x-16)=20

How many sides does a regular polygon have if each exterior angle measure is 45 degrees explain your answer, i really don't understand this.

Two numbers have a sum of -19. one number is x. what expression represents the other number?

Siri can type 90 words in 40 minutes about how many words would you expect her to type in 10 minutes at this rate