Answer:
I really don't know but can u help with mine-_-
1 + (-5) becomes 1 - 5 because you are adding a negative number.
1 - 5 is -4
(I)1.272727... = 14/11
(II)0.1282828...= 127/990
(The solution is in the picture
NB : the two points on the two numbers in the solution means those two numbers are recurring or repeating )
So, this is pretty simple actually.
3^c2 * 8^c6 * 1 = 84
Equivalent expressions are expressions of equal values
The simplified expression of (3 - 4i) + (7 - 6i) is 
The expression is given as:

Remove brackets in the above expression

Rewrite the expression by collecting the like terms

Next, evaluate the like terms

Hence, the simplified expression of (3 - 4i) + (7 - 6i) is 
Read more about equivalent expressions at:
brainly.com/question/2972832