Can someone please help, ty!! (Will mark brainliest)

What number should be added to the expression x^2+3x+ in order to create a perfect square trinomial? 3/2 3 9/4 9

The interior angles formed by the side of a hexagon have measures of them up to 720° what is the measure of angle a

Which of the following is a solution of z^6 = 64i? 2(cos105° + isin105°) 2(cos120° + isin120°) 2(cos135° + isin135°) 8(cos15° + isin15°)