exam Maths Puzzle Numerical Ability

Simplify the following

2x^4 ۪ 5x^2
10x^7 3x^5

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exam Other Question

x - 2 divided by x - x over x + 3 A chemist has 300 milliliters of a solution that is 18% acid. How many milliliters of acid are in the solution? McGraw Hill Beginning Algebra Chapter 6. Thanks so very much for your help!!!!!