3. What is the slope of the line that passes through (7,0) and (4, 9)? A.) 1/3
B.) 1/3
C.) -3
D.) 3
E.) none of these

Find the solution of system of equation y= x-4 y=4x+2

Find the perimeter of the triangle with vertices  d(3, 4),  e(8, 7), and  f(5, 9). do not round before calculating the perimeter. after calculating the perimeter, round your answer to the nearest tenth.  

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 : )