Divide 6x^7-21x^3/3x^3. Simplify your answer as much as possible

What is the measure of angle z in this figure? enter your answer in the box. z = ° two intersection lines. all four angles formed by the intersecting lines are labeled. clockwise, the angles are labeled 43 degrees, x degrees, y degrees, and z degrees.

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What could explain what happened when the time was equal to 120 minutes