Answer:
1/3
Step-by-step explanation:
2/3=6/9
6/9-3/9=3/9
3/9=1/3
Answer:
3
Step-by-step explanation:
15
-
12
-----
3
-1/2x+3=-x+7
Multiply throughout by 2x
-1+6x=-2x^2+14x
2x^2-8x-1=0
Answer: Third option.
Step-by-step explanation:
You need to find the surface area with the formula for calculate the surface area of a rectangular prism:
![SA=2(wl + lh + hw)](https://tex.z-dn.net/?f=SA%3D2%28wl%20%2B%20lh%20%2B%20hw%29)
Where w is the width, l is the length, and h is the height.
You can observe in the figure that:
![l=5cm\\w=4cm\\h=2cm](https://tex.z-dn.net/?f=l%3D5cm%5C%5Cw%3D4cm%5C%5Ch%3D2cm)
Then, substituting the values into the formula
, you get that minimum amount of cardboard used for the wrapper is:
![SA=2[(4cm)(5cm)+(5cm)(2cm)+(2cm)(4cm)]\\SA=76cm^2](https://tex.z-dn.net/?f=SA%3D2%5B%284cm%29%285cm%29%2B%285cm%29%282cm%29%2B%282cm%29%284cm%29%5D%5C%5CSA%3D76cm%5E2)