9x+3 y I’m in math hope that helps man
Answer:
2
Step-by-step explanation:
1/8+1/8= 2/8=1/4
the rectangle is but the line is not because the line has to have another side !
Answer:
16
Step-by-step explanation:
To solve, we can use an equation finding the average of the siblings'ages.
![\frac{14 + 12 + x}{3} = 14 \\ \ 14 + 12 + x = 42 \\ x = 42 - 14 - 12 \\ x = 16](https://tex.z-dn.net/?f=%20%5Cfrac%7B14%20%2B%2012%20%2B%20x%7D%7B3%7D%20%20%3D%2014%20%5C%5C%20%20%5C%2014%20%2B%2012%20%2B%20x%20%3D%2042%20%5C%5C%20x%20%3D%2042%20-%2014%20-%2012%20%5C%5C%20x%20%3D%2016)
Step-by-step explanation:
Surface area of a square pyramid is the area of the square base plus the area of the four triangles made from the base and the slant height.
SA = s² + 4(sh/2)
which reduces to:
SA = s² + 2sh
You are told that s = 11 and SA = 319. You can now solve for h:
319 = 11² + 2(11)h
319 = 121 + 22h
198 = 22h
h = 9 ft (answer C)
I hope it's helpful!!