7) y = 5x +3, y = 2x +21
what is the equal value method for this equation?

Describe the domain and range of y=2(3)^x-2+5

The radius of a sphere is 3 inches. which represents the volume of the sphere?

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 : )