What is the slope of a line that passes through the points (6, 5) and (12, -3)

Acomputer store bought a program at a cost of $10 and sold it for $13. find the percent markup

A3-dimensional figure has a square base and 4 lateral faces that meet at a point. explain the difference between the cross sections when a slice is made perpendicular to the base through the vertex, and when a slice is made perpendicular to the base and not through the vertex

The graph of f(x) = |x| is transformed to g(x) = |x + 11| - 7. on which interval is the function decreasing?