Geometry area of compound

Rewrite the hyperbolic equation 4y^2 -9x^2 +54x-8y-113=0

Nick has box brads. he uses 4 brads for the first project. nick let’s b represent the original number of brads and finds that for the second project, the number of brads he uses is 8 more than half the difference of b and 4. write an expression to represent the number of brads he uses for the second project.

What is the distance between point a and b