exam Maths Puzzle Numerical Ability

A. Is the following binomial a difference of squares?
9a^2 - 8b^2

B. If one-half a number is subtracted from five-sixths of the number, the difference is 6. Find the number

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exam Other Question

A line passing through (5,-6) and (-9, y) is perpendicular to a line with slope 14/5. Find the value of y.
A) 1
B) -4
C) -2
D) -1

Thanks for any help you can provide. Solve the compound inequality and graph on the number line: 1/3X > 2 and 1/4X > 2.