exam Maths Puzzle Numerical Ability

Divide this, please. Thanks.

(p^2 - q^2)/(p+q) divided by (p+q)/(p-q)

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exam Other Question

a window has a shape of a square of side s, with a semicircle of diameter s above it. Write an equation that expresses the total of the window as a function of s Can someone help me on this problem?

I need to write the equation of the line L satisfying the given geometric conditions

L has y-intercept (0, 2) and is perpendicular to the line with equation 2x - 3y = 6
Thanks, Ashley