exam Maths Puzzle Numerical Ability

Solve by factoring.
4x^2 - 1 = 0

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exam Other Question

Write the phrase as an algebraic expression. Let x represent the unknown number.
15) The sum of a number and fourteen 24. Welding: The parts bin which is 1 ft. by 2 1/2 ft. and 6 in made of 16 guage sheet metal. Calculate the volume in cubic feet and the total length of weld needed in feet.