exam Maths Puzzle Numerical Ability

The Environmental Protection Agency has called for businesses to find cleaner sources of energy as we approach the 21st century. Coal isnt considered to be a clean source. In 1950

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1.which is the equation of the line is perpendicular bisector of the segment with endpoints (n,5) and (n, -3)
A)y=1
B)y=4
c)x=4
D)y=n

2.which are the coordinates of the vert determine whether the pair of fractions are proportional.
7/9 = 21/27?

evaluate the expression then simplify. this is a fraction .
12divided by(3).(-8)
(3 to 2ndpower + 1 to 2nd power)+2