Answer:
![a = - 7](https://tex.z-dn.net/?f=a%20%3D%20%20-%207)
![a = - 1](https://tex.z-dn.net/?f=a%20%3D%20%20-%201)
Step-by-step explanation:
![(a+4) {}^{2} - 3 {}^{2} \\ a {}^{2} + 8a + 16 - 9 \\ a {}^{2} + 8a + 7 \\ a {}^{2} + a + 7a + 7 \\ a(a + 1) + 7(a + 1) \\ (a + 7)(a + 1) \\ a + 7 = 0 \: \: \: \: or \: \: \: \: a + 1 = 0 \\ a = - 7 \: \: \: \: \: \: \: \: or \: \: \: a = - 1](https://tex.z-dn.net/?f=%28a%2B4%29%20%7B%7D%5E%7B2%7D%20%20-%203%20%7B%7D%5E%7B2%7D%20%20%5C%5C%20a%20%7B%7D%5E%7B2%7D%20%20%2B%208a%20%2B%2016%20-%209%20%5C%5C%20a%20%7B%7D%5E%7B2%7D%20%20%2B%208a%20%2B%207%20%5C%5C%20a%20%7B%7D%5E%7B2%7D%20%20%2B%20a%20%2B%207a%20%2B%207%20%5C%5C%20a%28a%20%2B%201%29%20%2B%207%28a%20%2B%201%29%20%5C%5C%20%28a%20%2B%207%29%28a%20%2B%201%29%20%5C%5C%20a%20%2B%207%20%3D%200%20%5C%3A%20%20%5C%3A%20%20%5C%3A%20%20%5C%3A%20or%20%5C%3A%20%20%5C%3A%20%20%5C%3A%20%20%5C%3A%20a%20%2B%201%20%3D%200%20%5C%5C%20a%20%3D%20%20-%207%20%5C%3A%20%20%5C%3A%20%20%5C%3A%20%20%5C%3A%20%5C%3A%20%20%5C%3A%20%20%5C%3A%20%20%5C%3A%20%20or%20%5C%3A%20%20%5C%3A%20%20%5C%3A%20a%20%3D%20%20-%201)
It would be 2/10 or 1/5 simplified
Answer:
I hope this is helpful
Step-by-step explanation:
mark brainlest pls
<span>Example<span>Problem<span><span>Use elimination to solve the system.</span> x –<span> y = </span>−6x <span>+ y = 8</span></span> </span><span> Add the equations.</span><span> <span><span>2x = 2</span>x = 1</span><span>Solve for x.</span></span><span> <span>x<span> + y = 8</span><span>1 + y = 8</span>y = 8 – 1y = 7</span><span>Substitute x = 1 into one of the original equations and solve for y.</span></span><span> <span>x<span> – y = −6</span>1 – 7 = −6−6 = −6 TRUE</span><span>x<span> + y = 8</span>1 + 7 = 88 = 8TRUE</span><span>Be sure to check your answer in both equations!</span></span><span>AnswerThe solution is (1, 7). </span></span>
He is incorrect because each number is in a different place and those different places are worth more or less than the other places