What equation is equivalent to 10x + 15 y = -90

The number of branches on a tree demonstrates the fibonacci sequence. how many branches would there be on the next two levels of this tree? 13 | | | m branches

Which describes the difference between the graph of f(x)=x^2 and g(x)=-(x^2-2)

I'm confused on this could anyone me and show me what i need to do to solve it.