exam Maths Puzzle Numerical Ability

2X+5+3=9

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exam Other Question

prove the identity

(cosx+sinx)(1-sinxcosx)= cos^3x+sin^3x Susan needs to find out the surface area of a deck that has one side that is 5.75 feet and another that is 8 feet and another that is 3 feet by 5.75 feet.