Tatami mats are used as a floor covering in Japan. One possible layout uses four rectangular mats and one square mat as shown the area of the square mat is half the area of one of the regular mats

Add the fractions, and simply the result to lowest terms. 2/3 + 2/7= ?

Sanya noticed that the temperature was falling at a steady rate of 1.4 degrees every hour from the time that she first checked her outdoor thermometer. by 6 a.m., the temperature had fallen 21 degrees. which expression can you use to find how many hours earlier she had first checked the thermometer?

Anyone? 15m is what percent of 60m; 3m; 30m; 1.5 km?