Consider the complex number z = a + bi.
i. write z in polar form. what do the variables represent?
ii. if r = 3 and theta = 90°, where would z be plotted in the complex plane?
iii. use the conditions in part (ii) to write z in rectangular form. explain how this representation corresponds
to the location of z that you found in part (ii).

step-by-step explanation:

c.

step-by-step explanation:

because first you have to add the 4x, 9x, and the 7x together and you get 20x and then you add the last numbers up and you get 5and then you put the subtraction sign in there and that's how you get the answer.

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step-by-step explanation: