What is the sum? (2x^2 - 4x + 1) + (5x + x^2 - 1) 3x^2 + x

7x^2 - 3x

3x^2 + x + 2

7x^2 - x + 2

Negative 5 1/12 + negative 4 1/4 + 6 3/4

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) prove that 731^3−631^3 is divisible by 100 2) prove that 99^3−74^3 is divisible by 25