(ALGEBRA) You are told that the degree of a polynomial is n=4. You are given the solutions x=-1, x=5, and x=2+i. Those are only three solutions! What is the 4th solution, and how do you know?

not sure but it may be b, as i said i'm not sure.

a mantle plume is an upwelling of abnormally hot rock within the earth's mantle. as the heads of mantle plumes can partly melt when they reach shallow depths, they are thought to be the cause of volcanic centers known as hotspots and probably also to have caused flood basalts.

step-by-step explanation:

you estimate that the angle of elevation to the top of the 86th floor (the observatory) is 82 .the total height of the building is another 123 meters above the 86th floor.

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yes they are the same