Show how to use substitution or elimination to solve the following system of equations. write the solution as an ordered pair.

4x - y = 10
y = 2x - 2

In the equations, a and b represent the price per night for a room in hotel a and hotel b, respectively, w weeks after september 1 last autumn. what was the price per night in hotel a when it was equal to the price per night in hotel b? a = 240 − 20w b = 320 − 30w

Plot the points (0,6), (3,15.8), and (9.5,0) using the graphing tool, and find the function

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 : )