Afour-line classified ad costs $28 for a week. each additional line costs $10.50. what is the weekly cost of a 12-line ad?

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

Which of the following contains a variable?

What is the length of the segment, endpoints of which are intersections of parabolas y=x^2− 11/4 x− 7/4 and y=− 7 /8 x^2+x+ 31/8 ?