First you have to set up your equation. 5x+80 and x+15.
where is the chart i cant say with out a chart
put the chart in another question and ill awwnser it because theres not enough information
![-2m^2+4mn-6n^2](https://tex.z-dn.net/?f=-2m%5E2%2B4mn-6n%5E2)
1) Let's write out both expressions subtracting 4m²+2mn+8n² from 2m²+6mn+2n²
![\begin{gathered} 2m^{2}+6mn+2n^{2}-(4m^{2}+2mn+8n^2)_{} \\ 2m^2+6mn+2n^2-4m^2-2mn-8n^2 \\ -2m^2+4mn-6n^2 \end{gathered}](https://tex.z-dn.net/?f=%5Cbegin%7Bgathered%7D%202m%5E%7B2%7D%2B6mn%2B2n%5E%7B2%7D-%284m%5E%7B2%7D%2B2mn%2B8n%5E2%29_%7B%7D%20%5C%5C%202m%5E2%2B6mn%2B2n%5E2-4m%5E2-2mn-8n%5E2%20%5C%5C%20-2m%5E2%2B4mn-6n%5E2%20%5Cend%7Bgathered%7D)
2) Note that when we subtract 4m^2 + 2mn + 8n^2 from 2m^2 + 6mn + 2n^2 we need to swap the sign by placing -1 outside the parentheses and then combine like terms adding those terms algebraically.
A = (1/2)(x)(y)
Let x = diagonal 1
Let y = diagonal 2
The product of xy = 144.
This means that x = 12 and y = 12.
So, 12 • 12 = 144
Each diagonal is 12 feet.
Prove:
72 feet = (1/2)(12)(12) feet
72 feet = (1/2)(144) feet
72 feet = 72 feet