Abuilding is in the shape of a cube. if the height of the building is 21 meters, what is its surface area?

Which expression is equivalent to 2x^2+2x-4/2x^2-4x+2

What is the area of triangle abc if a = 8, b = 11, and c = 15?

Scenario: a rectangular plot of ground is 5 meters longer than it is wide. its area is 20,000 square meters. question: what equation will you find the dimensions? note: let w represent the width. options: w(w+5)=20,000 w^2=20,000+5 (w(w+5))/2=20,000 w+2(w+5)=20,000