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99 - 9k = 9k - 27
Add 27 to both sides
126 - 9k = 9k
Add 9k to both sides
126 = 18k
Divide by 18
k = 126 / 18 = 7
Answer: 9yd 1ft
Step-by-step explanation: im not 100% sure tho
Answer:

Step-by-step explanation:
Given

Required
The average rate over ![[2,b]](https://tex.z-dn.net/?f=%5B2%2Cb%5D)
Average rate (m) is calculated using:

Where
![[a,b] = [2,b]](https://tex.z-dn.net/?f=%5Ba%2Cb%5D%20%3D%20%5B2%2Cb%5D)
So, we have:

Calculate f(b) and f(2)



So, we have:



Expand the numerator

Factorize

Factor out 3b + 6

Cancel out b - 2
