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How do you do these problems? Simplify 3√24x^2 and add and simplify 4√3 -3√27 +√49? Need help with determining the structural formula!!? Write the equation reaction to explain your observations upon the addition of K3PO4? How many pennies can you fit in a 55 gallon drum? Find the perimeter of parallelogram is found by +×÷*??? The length of all the sides of the figure.... do I add, multiple, subtract or divide?