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It says to give my answer to the nearest tenth. What does this mean ?

i got this : 14.8660...

so does it mean i round it to 15 ? or 14.9 ?

14.9 is correct.

In this number, 14.86, the 8 is in the tenths place. Since 6 is more than 5, you round up to 14.9.

* The direction each parabola opens
* The vertex of each parabola

y = x2 - 2x
y = -2x2 + 4x - 3

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