Seven students cut 5 and three-fourths inches of thread from a spool for a school project. What number represents the change in the amount of the thread on the spool?

If you are just building your payment history, how many points from a perfect score will you possibly miss?

What is the solution to this system of equations? y= 2x - 3.5 x - 2y = -14

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?