Georgina mailed a letter that had a mass of 0.052 kilograms. What is the greatest possible error in the mass measurement of a letter?

Gretchen is setting up for a banquet. she has 300 chairs and needs to distribute them evenly among t tables. how many chairs should she put at each table? write your answer as an expression.

How do you use the elimination method for this question? explain, because i really want to understand!

The perimeter of an equilateral triangle is 4 cm more than the perimeter of a square and the length of a side of the triangle is 8 cm more than the length of a side of the aware. find the length of a side of the equilateral triangle