exam Maths Puzzle Numerical Ability

Write an equation of each line. Write the equation in the form y=mx+b
Through (-2.-3) perpendicular to 2x-3y=1

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exam Other Question
A sphere has a diameter of 12m. Find its volume using Pie=3.14 as an approximation Prove that:
1 + cos A/ 1 - cos A = tanČA/(secA - 1)Č