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Which is the equation of an ellipse with directrices at x = ±4 and foci at (2, 0) and (−2, 0)?

Sara can take no more than 22 pounds of luggage on a trip.her suitcase weighs 112 ounces.how many more pounds can she pack without going over the limit?

If you are trying to move an attached term across the equal sign (=), what operation would you use to move it?