Answer:
She added the exponents instead of subtracting them.
Step-by-step explanation:
She was to simplify:

Dividing the numerator with 3 and the denominator with three gives:

Then, x³ ÷
would be
= 
(Where there is division; we are supposed to subtract the exponents.)
So the final answer would be: 
Answer:
it the one that say he didn times 2 an eigt togeter incorrect
Step-by-step explanation:
3/11
1 - (-2) = 3
4 - (-7) = 11
Here is the work if needed
Question 1)
Gwen has already burned 100 calories when Tristan and Keith started, and he continues to burn 10 calories per minute. The equation for Gwen is
y = 100 + 10x
Question 2)
`Tristan is burning 125 calories every 10 minutes. His burning calories rate is 12.5 calories per minute. The equation for Tristan is
y = 12.5x
Question 3)
Keith is burning 300 calories in 30 minutes. His rate per minute is 10 calories per minute. The equation for Keith is
y = 10x
It’s 33 hope it helped:) you were right btw the other person who answered it.