Answer:
i can't see anything
Step-by-step explanation:
16 x 5= 80. 80 divided by 2 (50 percent) is 40.
Answer:
sorry i can not anderstand pls
Answer:![1.627\times 1.627\times 1.88\ ft^3](https://tex.z-dn.net/?f=1.627%5Ctimes%201.627%5Ctimes%201.88%5C%20ft%5E3)
Step-by-step explanation:
Given
Suppose side face have a dimension of l\times l
and width of h
volume ![V=l^2\cdot h](https://tex.z-dn.net/?f=V%3Dl%5E2%5Ccdot%20h)
![h=\frac{V}{l^2}](https://tex.z-dn.net/?f=h%3D%5Cfrac%7BV%7D%7Bl%5E2%7D)
volume ![V=5 ft^3](https://tex.z-dn.net/?f=V%3D5%20ft%5E3)
Area of side wall is ![A_s=l^2](https://tex.z-dn.net/?f=A_s%3Dl%5E2)
Area of top Wall ![A_t=l\times h](https://tex.z-dn.net/?f=A_t%3Dl%5Ctimes%20h)
Area of bottom ![A_b=l\times h](https://tex.z-dn.net/?f=A_b%3Dl%5Ctimes%20h)
Cost of bottom wall ![c_b=20\times l\times h=20lh](https://tex.z-dn.net/?f=c_b%3D20%5Ctimes%20l%5Ctimes%20h%3D20lh)
Cost of top wall ![c_t=50\times l\times h=50lh](https://tex.z-dn.net/?f=c_t%3D50%5Ctimes%20l%5Ctimes%20h%3D50lh)
Cost of side walls ![c_s=4\times l^2\times 10=40l^2](https://tex.z-dn.net/?f=c_s%3D4%5Ctimes%20l%5E2%5Ctimes%2010%3D40l%5E2)
total cost ![C=c_s+c_t+c_b=20lh+50lh+40l^2](https://tex.z-dn.net/?f=C%3Dc_s%2Bc_t%2Bc_b%3D20lh%2B50lh%2B40l%5E2)
![C=70lh+40l^2](https://tex.z-dn.net/?f=C%3D70lh%2B40l%5E2)
![C=70\times l\times \frac{5}{l^2}+40l^2](https://tex.z-dn.net/?f=C%3D70%5Ctimes%20l%5Ctimes%20%5Cfrac%7B5%7D%7Bl%5E2%7D%2B40l%5E2)
differentiate C w.r.t l to get minima or maxima
![\frac{\mathrm{d} C}{\mathrm{d} l}=0](https://tex.z-dn.net/?f=%5Cfrac%7B%5Cmathrm%7Bd%7D%20C%7D%7B%5Cmathrm%7Bd%7D%20l%7D%3D0)
![-\frac{350}{l}+80l^2=0](https://tex.z-dn.net/?f=-%5Cfrac%7B350%7D%7Bl%7D%2B80l%5E2%3D0)
![l^3=\frac{350}{80}](https://tex.z-dn.net/?f=l%5E3%3D%5Cfrac%7B350%7D%7B80%7D)
![l=1.627 ft](https://tex.z-dn.net/?f=l%3D1.627%20ft)
![h=\frac{5}{2.648}](https://tex.z-dn.net/?f=h%3D%5Cfrac%7B5%7D%7B2.648%7D)
![h=1.88 ft](https://tex.z-dn.net/?f=h%3D1.88%20ft)
Dimension of Box is ![1.627\times 1.627\times 1.88\ ft^3](https://tex.z-dn.net/?f=1.627%5Ctimes%201.627%5Ctimes%201.88%5C%20ft%5E3)
Answer:
![7y - 4x](https://tex.z-dn.net/?f=7y%20-%204x)
Step-by-step explanation:
![-3 (2x-y)+2y+2(x+y)\\](https://tex.z-dn.net/?f=-3%20%282x-y%29%2B2y%2B2%28x%2By%29%5C%5C)
Step 1: Open the brackets
![= -6x+3y +2y +2(x+y)\\=-6x +3y + 2y +2x + 2y](https://tex.z-dn.net/?f=%3D%20-6x%2B3y%20%2B2y%20%2B2%28x%2By%29%5C%5C%3D-6x%20%2B3y%20%2B%202y%20%2B2x%20%2B%202y)
Step 2: Bring the similar variables together
![=-6x +2x \ +3y + 2y + 2y](https://tex.z-dn.net/?f=%3D-6x%20%2B2x%20%5C%20%2B3y%20%2B%202y%20%2B%202y)
Step 3: Simplify by adding/subtracting the coefficients of the similar variables
![= - 4x +7y](https://tex.z-dn.net/?f=%3D%20-%204x%20%2B7y)
Step 4: Rearrange as required.