Special RIght Triangles: Can someone just explain these two, how to do them with steps. Thanks!

Find the solution(s) to the system of equations. select all that apply y=x^2-1 y=2x-2

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 : )

1- how are translations represented as a function? . . 2- what is the relationship between a translation and a rigid motion? answer my grade depends on it! you so much