Answer:
x = 8
Step-by-step explanation:
The product of the length of the exterior segment of a secant and the length of the secant is equal to the correpsonding operation with the other secant.
9(9 + 11) = 10(10 + x)
180 = 100 + 10x
10x = 80
x = 8
Answer:
B
Step-by-step explanation:
Since you're painting the sides of the cube, you will need the equation for the surface area of a cube, which is
![SA = 6s^{2}](https://tex.z-dn.net/?f=SA%20%3D%206s%5E%7B2%7D%20)
, where SA = surface area and s = length of an edge of the cube.
You're told that the edge length, s = 2cm. Plug this into the equation for surface area:
The surface area that will be painted is <span>
24 cm².</span>
Solutions: x=3 , y=5 , z=2
x+y+z=10
2x-5y+2z=-15
4x+y-z=15