Answer:
It's the 3rd picture. -3 1/4 + 4 3/4 = 1 1/2
Step-by-step explanation:
Well that friend should write p + 6 after combining like terms and simplifying
Answer:
<h2>
![a = \frac{8A}{\pi {r}^{2} } + 1 \\](https://tex.z-dn.net/?f=a%20%3D%20%20%5Cfrac%7B8A%7D%7B%5Cpi%20%7Br%7D%5E%7B2%7D%20%7D%20%20%2B%201%20%5C%5C%20)
</h2>
Step-by-step explanation:
![A = \frac{1}{8} \pi {r}^{2} (a - 1) \\](https://tex.z-dn.net/?f=A%20%3D%20%20%5Cfrac%7B1%7D%7B8%7D%20%5Cpi%20%7Br%7D%5E%7B2%7D%20%28a%20-%201%29%20%5C%5C%20)
First of all multiply through by 8 to eliminate the fraction
That's
![8A = 8 \times \frac{1}{8} \pi {r}^{2} (a - 1) \\8 A = \pi {r}^{2} (a - 1)](https://tex.z-dn.net/?f=8A%20%3D%208%20%5Ctimes%20%20%5Cfrac%7B1%7D%7B8%7D%20%5Cpi%20%7Br%7D%5E%7B2%7D%20%28a%20-%201%29%20%5C%5C8%20A%20%3D%20%5Cpi%20%7Br%7D%5E%7B2%7D%20%28a%20-%201%29)
<u>Divide both sides by πr²</u>
![\frac{8A}{\pi {r}^{2} } = \frac{\pi {r}^{2}(a - 1) }{\pi {r}^{2} } \\ a - 1 = \frac{8A}{\pi {r}^{2} }](https://tex.z-dn.net/?f=%20%5Cfrac%7B8A%7D%7B%5Cpi%20%7Br%7D%5E%7B2%7D%20%7D%20%20%3D%20%20%5Cfrac%7B%5Cpi%20%7Br%7D%5E%7B2%7D%28a%20-%201%29%20%7D%7B%5Cpi%20%7Br%7D%5E%7B2%7D%20%7D%20%20%5C%5C%20a%20-%201%20%3D%20%20%5Cfrac%7B8A%7D%7B%5Cpi%20%7Br%7D%5E%7B2%7D%20%7D%20)
Move 1 to the other side of the equation to make a stand alone
We have the final answer as
![a = \frac{8A}{\pi {r}^{2} } + 1 \\](https://tex.z-dn.net/?f=a%20%3D%20%20%5Cfrac%7B8A%7D%7B%5Cpi%20%7Br%7D%5E%7B2%7D%20%7D%20%20%2B%201%20%5C%5C%20)
Hope this helps you