exam Maths Puzzle Numerical Ability

(-2b6 + 3b4 - b2) + (b6 + 2b4 + 2b2). Please show me how to solve adding and subtracting polynomials

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exam Other Question

Show how a test point for the inequality 3x+y >= 6 tells which side will be shaded. (Show the test point results and explain what that means) How many yards of material from a 24-yard length of cloth remain after 3 pieces, each 3 1/2 yards long, and 5 pieces, each 2 1/4 yards long are removed?