If the difference of a number and three is doubled, the result is seven more than the number. Find the number. Round your answer to the nearest integer, if necessary.

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 : )

What is the slopeof the live that passes through the points and (-2,-5) and (3,-1)

Do u add or subtract after u multiply