exam Maths Puzzle Numerical Ability

Find the slope of the line passing through the points (9,9) and (-9,-1)
a. -9/5
b. 9/5
c. -5/9
d. 5/9

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exam Other Question

WRite a 2 column proof of the following: in an isosceles triangle start at the vertex of each of the two bases and draw a segment to the midpoint of the opposite leg. Prove the se simplify the following radical expression assume that all variables represent positive real numbers

/72x^3