exam Maths Puzzle Numerical Ability

Given the two points (4,6) and (8,18) write the point slope form and slope intercept form of the line.

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exam Other Question

a swimming pool is 20 feet wide and 40 feet long it is surrounded by square tiles each 1 foot by 1 foot. how many tiles are there surrounding the pool? I would appreciate any help I could get with this equation (6y^2-5y+1)/12y^2-5y-2)*(4y^2+3y-1)/(3y^2-4y+1)
Thank you