Factor the expression completely over the complex numbers. y4+14y2+49

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Which term best describes the association between variables a and b

Sandy is ordering bread rolls for her party,she wants 3/5 of the rolls to be whole wheat. what other factions can represent part of the rolls that will be whole wheat? shade the models to show your work.

Ten times the square of a non-zero number is eqaul to ninety times the number