book Maths Puzzle Numerical Ability

solving of this quadrtic inequality make not sense to me Please help

w -6
_______ < 0
w

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book Other Question

The lengh of a rectangle is represented by (x-6) and the width of the rectangle is represented by (x+2). Express the area of this rectangle as a binomial in terms of x. I need help quickly on these I have no idea how to work these. Thank you for your help.

Write an equation on the line that has slope = -(2/3) and passes through (5, -4)

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