exam Maths Puzzle Numerical Ability

Explan why a^2+b^2 cannot be factored.

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exam Other Question

solve the following systems by addition. If a unique solution does not exist, state whether the system is inconsistent or dependent.

X+5Y=10
-2X-10Y=-20 A pizza restaurant offers circular pizzas in 3 sizes. The small pizza has diameter 10 inches and sells for $15.20. The medium pizza has diameter 12 inches and sells for $18.85.