What should you substitute for x in the bottom equation to solve the system by the substitution method? A. x=2y-8

B. x=-2y-8

C. x=-2y+8

D. x=2y+8

Regular price is $77.00 and the discount is 5% find the sale price

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 : )

Delbert keeps track of total of the total number of points he earns on homework assignments, each of which is worth 60 points. at the end of the semester he has 810 points. write an equation for delbert’s average homework score a in terms of the number of assignments n.