Which number line model represents the expression -2 1/2 + (-5)?

For f(x) = 3x+1 and g(x) = x2 - 6, find (g/f)(x)

This is a map of the mars exploration rover opportunity predicted landing site on mars. the scale is 1cm : 9.4km. what are the approximate measures of the actual length and width of the ellipse? i mostly need to know how to set it up : )

Find the length of the normal and the angle it makes with the positive x-axis. (see pictured below)