Which is the equation of an ellipse with directrices at y = ±2 and foci at (0, 1) and (0, −1)? x squared over 4 plus y squared over 1 equals 1
x squared over 1 plus y squared over 2 equals 1
x squared over 1 minus y squared over 4 equals 1
x squared over 1 minus y squared over 2 equals 1

135 is your answer

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try 180 times three then divide that number by 4 (sides) to get your answer. im glad to : )

y=3n + 1

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this is wrong because it says the second number is one less and i added one instead

knlknlkkn

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answer: i think you should do the math and pay attention in class : )

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that is truly what   think but if i get the answer i will