Lucy cuts 4 squares with side length x in. from the corners of a 6 in. by 9 in. cardboard rectangle. she folds the remaining cardboard to make a tray that is x in. high. write and simplify a polynomial function for the volume v of the tray in terms of x.

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?

Complete the solution of the equation. find the value of y when x equals to 28 x+3y=28

If the ratio of sum of the first m and n terms of an ap is m2 : n2 , show that the ratio of its mth and nth terms is (2m − 1) : (2n − 1).