Which simplifications of the powers of i are correct? there may be more than one correct answer.
select all correct answers.
i^22=1
i^11=−i
i^21=i
i^12=i
i^20=1
i^26=−1
i^27=i

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You need to solve a system of equations. you decide to use the elimination method. which of these is not allowed? 3x - 2y = 7 3x + 4y = 17 equation 1 equation 2

Isabel graphed the following system of equations. 2x – y = 6 y = -3x + 4 she came up with the solution (2,-2). what were the 3 steps she did to get that solution? (make sure they are in the correct order)