exam Maths Puzzle Numerical Ability

Prove that and explain that x/a+y/b=1 has x intercept a and y intercept b

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exam Other Question

PQR is an isosceles triangle such that , QP=QR=13cm and the altitude PS=12cm . Find the length of PR ? PLS HELP . Thanks Write an equation of the line that passes through (0,-4) and is parallel y=(3/)x+2. Write in slope-intercept form.
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