Jack's mother gave him  50  chocolates to give to his friends at his birthday party. he gave  3  chocolates to each of his friends and still had  2 chocolates left. write an equation to determine the number of friend (x) at jack's party. find the number of friends at jack's party.

You are standing next to a really big circular lake. you want to measure the diameter of the lake, but you don't want to have to swim across with a measuring tape! you decide to walk around the perimeter of the lake and measure its circumference, and find that it's 400\pi\text{ m}400? m. what is the diameter dd of the lake?