Suppose A={−2,1,3,6,14}, B={−4,2,1,6,9}, and C={−2,6,9,12}. What is (A∩B)∪C?

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 equation of the line that is parallel to the line with the equation y= -3/4x +1 and passes through the point (12,-12)

If tan2a=cot(a+60), find the value of a, where 2a is an acute angle