ANSWER

EXPLANATION
The given expression is

This is the same as:

In index notation, we write this as

To write this as a negative index, we use the property:

This implies that;

Answer:
I think the answer might be D. 2x+4x=150
Step-by-step explanation:
Hope this helps!
To find a percentage, you need to divide 7 by 9 to find out what 7/9 is.
It turns out to be 0.777 repeating.
To find a percentage, you need to move the decimal place over by two to the right, so 7/9 is equals to 77.77%.
If you round that, then 77.77% is closest to 78%.
Hope this helps!