Y = 2x + 7
a) Work out the value of y when x=4
b) Work out the value of y when x=-3

If f(x)=3x+1 and f^-1=x-1/3, then f^-1(7)=

Which shows the correct solution of the equation 1/2a+2/3b=50, when b=30?

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 : )