x = 5.
I attached an image of my work!
Step 1: Subtract 8 from both sides
4x = 20
Step 2: Divide each side by 4
x = 5
I don’t know if this is right but for
Y=4x+7 your m would be 4/1 and where you begin would be 7
2x-5y=10: you would take 10 and divide it by the two numbers in front (10 divided by 2= 5) (10 divided by -5=-2)
For 3x+4y=16 you would do the same you did for the last equation (16 divided by 3= 5.3) (16 divided by 4=4
Answer:
1) 366
2) 448
3) 748
Step-by-step explanation:
![SA_1 = 2(lw + lh + wh) = 2(13 * 9 + 13 * 3 + 9 * 3) = 2(117 + 39 + 27) = 2 * 183 = 366](https://tex.z-dn.net/?f=SA_1%20%3D%202%28lw%20%2B%20lh%20%2B%20wh%29%20%3D%202%2813%20%2A%209%20%2B%2013%20%2A%203%20%2B%209%20%2A%203%29%20%3D%202%28117%20%2B%2039%20%2B%2027%29%20%3D%202%20%2A%20183%20%3D%20366)
![SA_2 = 2(lw + lh + wh) = 2(20 * 4 + 20 * 6 + 4 * 6) = 2(80 + 120 + 24) = 2 * 224 = 448](https://tex.z-dn.net/?f=SA_2%20%3D%202%28lw%20%2B%20lh%20%2B%20wh%29%20%3D%202%2820%20%2A%204%20%2B%2020%20%2A%206%20%2B%204%20%2A%206%29%20%3D%202%2880%20%2B%20120%20%2B%2024%29%20%3D%202%20%2A%20224%20%3D%20448)
![SA_3 = 2(lw + lh + wh) = 2(16 * 14 + 16 * 5 + 14 * 5) = 2(224 + 80 + 70) = 2 * 374 = 748](https://tex.z-dn.net/?f=SA_3%20%3D%202%28lw%20%2B%20lh%20%2B%20wh%29%20%3D%202%2816%20%2A%2014%20%2B%2016%20%2A%205%20%2B%2014%20%2A%205%29%20%3D%202%28224%20%2B%2080%20%2B%2070%29%20%3D%202%20%2A%20374%20%3D%20748)