Find the reciprocals of the numbers below.
the reciprocal of 4
the reciprocal of 9/10 is

What expression is equivalent to (2x-1)(x-3)?

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?

Put the following steps for calculating net worth in the correct order