IF YOU SOLVE I WILL BE YOUR BEST FRIEND I SWEAR. ALSO WILL AWARD THE BRAINLIEST THING. PLEASE. I NEED THESE GRADES SO I WONT BE A DISSAPOINTMENT TO MY MY MOM!

see below

Step-by-step explanation:

x⁵ - 8x⁴ + 22x³ - 26x² + 21x - 18 = 0

x = 2,  x = ± i,   x=3  with multiplicity 2

x⁴ - 5x³ + 7x² - 5x + 6 = 0

x = 2,   x=3,   x = ± i

-1 + 4i    =  4 + i

    i

x³ - 26x² + 21x - 18 = 0

x = ± 2i,   x = 3/2

(1 + i) (-3 - 4i)

= 1 - 7i

6.

(-5 + 2i) + (3 - 6i)

= -2 -4i

7.

x⁴ + 5x² + 4 = 0

x = ± i ,     x = ± 2i

8.

(7 - i) - (-5 + 6i)

= 12 - 7i

9.

(4 - i) (4 + i)

= 17

10.

(3 + 8i) (4 - 3i)

= 36 + 23i

walter needs to make at least 5 more cookies but no more than 40. 5 ≥ x ≥ 40;

step-by-step explanation:

walter has to make a minimum of 20 cookies. he already has 15 cookies made, so he must make 5 more to meet the minimum.

the maximum amount of cookies he can make is 55. he already has 15, so he has to make no more than 40 more cookies to meet the maximum.