17. 2/3
18. 1 1/9
20.9 1/11
21. 2 909/100 (closest i could get)
Hope I helped and hope you had a good day!
Remember
i²=-1 so
i³=-i
i⁴=1
so
5i⁴+2i³+8i²-4
5(1)+2(-i)+8(-1)-4
5-2i-8-4
-7-2i is the form
Answer:
2.5 cm
Step-by-step explanation:
5 Cm is the diameter and the radius is half the diameter so 5/2=2.5 or 1/2
Answer:
8
Step-by-step explanation:
z/4 - 11 = -9
z/4 = 2
z = 8
1+89, 2+88, 3+87......45+45.....!!
