Choose Yes or No to tell if the fraction 58 will make each equation true.

815−□=37
□−516=58
78−12=□
34−18=□

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 : )