25schools: Zambia Quizzes | Master Grade 8 - 12

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Standard Form (Scientific Notation)

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question 1 of 15 Grade: Eleven - G11

Q: The actual value of a quantity is 50 kg and the measured value is 48 kg. Calculate the relative error

x²-y²=(x-y)(x+y)=21 → 7(x+y)=21 → x+y=3. Solve x-y=7, x+y=3: add → 2x=10 → x=5, then y=3-5=-2.

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x²-y²=(x-y)(x+y)=21 → 7(x+y)=21 → x+y=3. Solve x-y=7, x+y=3: add → 2x=10 → x=5, then y=3-5=-2.

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Zambia