1,474 prompts matching "A joint variation problem set in a Nigerian transport fare"
Worked example: Changing the subject when the letter occurs on both sides
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WAEC pitfalls: Applying an inverse operation to only part of a side
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Worked example: Using the constant to predict a further value
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Teach me: Recognising a quadratic expression
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WAEC pitfalls: Cancelling a factor containing the unknown and losing a root
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Teach me: Why completing the square works
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Worked example: Substituting into the quadratic formula carefully
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WAEC pitfalls: Dropping the plus-or-minus from the formula
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Worked example: Solving a related equation by adding a line to the graph
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WAEC pitfalls: Joining the points of a parabola with straight lines
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WAEC pitfalls: Leaving out the two radii when finding a sector's perimeter
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Worked example: Rolling a sector into a cone
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WAEC pitfalls: Using the sector radius as the cone's base radius
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Worked example: The slant height in a cone's surface area
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WAEC pitfalls: Using the slant height where the vertical height belongs
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WAEC pitfalls: Leaving out one of the two circular faces
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Teach me: A compound solid made of a cone and a cylinder
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Worked example: Finding a missing dimension from a given compound volume
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WAEC pitfalls: Counting a hidden joining face in the surface area
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Worked example: The class midpoint and the class width
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