Answer:

Step-by-step explanation:
Answer:
The coordinates of 8i on the a complex plane are
(0, 8i)
Well, variables are stuff like x and y because they can represent a number. They are variable in an equation. so if you have (3x^3)+(5X^2)+Y+9 then your variables are x X and Y (im assuming the capital X is there and not a typo) if that was a typo and meant to be lowercase, then its just a 2 variable with the x and y
Answer:
9
Step-by-step explanation:
.9*10=10
it's basically simple multiplication with a decimal