Definition of negative exponent:

Following the definition, we have:

Answer: -9
I think its 7x since x represents the hours she worked. So lets say that she worked for 5 hours this day. It would be 5*7 which is $35. So it is 7x and if there is any choices you might say it as well so we can help you better
Answer:
i believe d. I could be wrong
Step-by-step explanation:
Answer:
You can find its average speed.
Step-by-step explanation:
To find average speed you can divide distance by time which has been given.
The answer is D. 42
A triangle equals 180 in total so what you would do it subtract 122 from 180 because 180 is also the angle of a straight line. You would get 58 then you add 58 and 80 to get 138. Subtract 138 from 180 and you get your answer of 42