8 pens and 5 pencils cost $31 and 4 pens and 7 pencils cost $29. Find the cost of 3 pens and 3 pencils

To prove that def ~ gfh by the sss similarity theorem using the information provided in the diagram, it would be enough additional information to know that

Select a graph that have an equation with a < 0

The pyramid below was dissected by a horizontal plane which shape describes the pyramid horizontal cross section