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Evgen [1.6K]
3 years ago
5

Help please!!!Which of the quadratic functions has the narrowest graph? 1)y=9x^2 2)y=-0.9x^2 3)y=-10x^2 4)y=2/5x^2

Mathematics
1 answer:
Norma-Jean [14]3 years ago
7 0

Answer:

Option 3) y = -10x²

Step-by-step explanation:

If a quadratic function is in the form of

y = ax² + bx + c

Then coefficient 'a' decides how much narrow will be the graph.

Now from the given options, option C  (y = -10x²) will be the narrowest graph.

Option 3) y = -10x²

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In a particular month, Ezhil spent one-fifth of her salary on shopping. Two-fifth of the remaining she gave to her sister. If sh
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Answer:

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Required

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Given that she spent \frac{1}{5} of her salary on shopping, this implies that she has \frac{4}{5} of her salary left

From what's left, she gave her sister \frac{2}{5}

This means she gave her sister \frac{2}{5} * \frac{4}{5}

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This means that

\frac{12}{25} of Salary = Rs11,040

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\frac{12}{25} * \frac{25}{12} * Salary = Rs11,040 * \frac{25}{12}

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