Answer:
The average rate of change is 39
Step-by-step explanation:
First, plug x=10 and x=20 into the formula:
10^2+90+18
190+18
208
20^2+180+18
400+198
598
598-208=390
390/10 = 39
The average rate of change is 39
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If you mean 
, then the answer is 3.
In fact, rational exponents work like this:
![a^{\frac{b}{c}}=\sqrt[c]{a^b}](https://tex.z-dn.net/?f=%20a%5E%7B%5Cfrac%7Bb%7D%7Bc%7D%7D%3D%5Csqrt%5Bc%5D%7Ba%5Eb%7D%20)
So, in your case,
![27^{\frac{1}{3}}=\sqrt[3]{27} = 3](https://tex.z-dn.net/?f=%2027%5E%7B%5Cfrac%7B1%7D%7B3%7D%7D%3D%5Csqrt%5B3%5D%7B27%7D%20%3D%203%20)
because 
X 3
-- = --
8 7
Cross Multiply
7x = 24
Divide
x = 3.2485...
A
Answer:
2
Step by step:
1•2=2
2•2=4
3•3=6
And so on...
Hope this helps!!
Answer:
(8.5)
Step-by-step explanation:
Just add the 2 numbers
