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Maths Puzzle
Numerical Ability
what is arithmetwists?
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exam Other Question
I am so stuck...I can find the vertex, focus, and directrix given the equation but can not do an equation from given properties.
Write the equation of the parabola in stand form
Tell whether each of the following parabolas opens upward or
downward. a. y = x^2 - 1 a. _________
b. y = - 3x^2 b. _________