I’m not 100% sure but isn’t it x2 +xy +y2?
5x+1(6-4) = +1(5x6)-(5x)
this would be a hard question to answer but i think i can do it ((( nNOTTTT))))
Answer:
The average rate of change between x = 2 and x = 4 is of 4.
Step-by-step explanation:
Average rate of change:
The average rate of change of a function f(x) in an interval [a,b] is given by:
![A = \frac{f(b)-f(a)}{b-a}](https://tex.z-dn.net/?f=A%20%3D%20%5Cfrac%7Bf%28b%29-f%28a%29%7D%7Bb-a%7D)
In this question:
![f(x) = 4x - 2, b = 4, a = 2](https://tex.z-dn.net/?f=f%28x%29%20%3D%204x%20-%202%2C%20b%20%3D%204%2C%20a%20%3D%202)
Thus:
![f(b) = f(4) = 4(4) - 2 = 16 - 2 = 14](https://tex.z-dn.net/?f=f%28b%29%20%3D%20f%284%29%20%3D%204%284%29%20-%202%20%3D%2016%20-%202%20%3D%2014)
![f(a) = f(2) = 4(2) - 2 = 8 - 2 = 6](https://tex.z-dn.net/?f=f%28a%29%20%3D%20f%282%29%20%3D%204%282%29%20-%202%20%3D%208%20-%202%20%3D%206)
Average rate of change:
![A = \frac{f(b)-f(a)}{b-a}](https://tex.z-dn.net/?f=A%20%3D%20%5Cfrac%7Bf%28b%29-f%28a%29%7D%7Bb-a%7D)
![A = \frac{14-6}{4-2}](https://tex.z-dn.net/?f=A%20%3D%20%5Cfrac%7B14-6%7D%7B4-2%7D)
![A = \frac{8}{2}](https://tex.z-dn.net/?f=A%20%3D%20%5Cfrac%7B8%7D%7B2%7D)
![A = 4](https://tex.z-dn.net/?f=A%20%3D%204)
The average rate of change between x = 2 and x = 4 is of 4.
Answer:
The expression that can be used is 0.80x
Step-by-step explanation:
Let
x ----> original price of an item
Remember that
![100\%-20\%=80\%](https://tex.z-dn.net/?f=100%5C%25-20%5C%25%3D80%5C%25)
That means---> the sale price is 80% of the original price
To find out the sale price, determine the 80% of the original price
----> percentage in decimal form
Multiply the original price by the percentage in decimal form to obtain the sale price
so
![0.80x](https://tex.z-dn.net/?f=0.80x)