Which of the following equations demonstrate that the set of polynomials is not
closed under the certain operations?

An appliance store sells a washer-dryer combination for $1800. if the washer costs $300 more than the dryer, find the cost for each appliance.

Solve the following inequalities and show the solution on a number line. 2x+3< 3(4x+5)

Find the actual dimensions of the box. the side length are in meters and integers. the surface area of the box is 104 m2 and volume of the box is 60 m3.