What is the surface area of a triangular pyramid if each face has an area of 80 m2?

What is the common difference in the following arithmetic sequence? 7,3,-1,-5

The figure below shows rectangle abcd and the triangle eca on a coordinate plane.which of the following expressions represents the perimeter of triangle of triangle eca in units

What are the solutions to the following equation? |m| = 8.5 the value of m is equal to 8.5 and because each distance from zero is 8.5.