You multpily the length and the width to find the area of a shape. If the square is 3ft wide, then the square is also 3 ft long if the area is 9.
so, how tall is it?
3 ft. I meant rectangle. Its still the same for the height.
Answer:
The answer is 4
Step-by-step explanation:
x^2-2x-8=1/4x-1
x^2-9x/4-7=0
4x^2-9x=28
Therefore if we take value of x as 4 aur eq.get balanced...
Given:
Dimensions are 7 ft by 5 ft by 8.5 ft
Contents weigh 0.21 pound
Contents worth $8.80 per pound
Find-: value of container contents.
Sol:
Volume is:
![\begin{gathered} Volume\text{ = }7\times5\times8.5 \\ \\ =297.5 \end{gathered}](https://tex.z-dn.net/?f=%5Cbegin%7Bgathered%7D%20Volume%5Ctext%7B%20%3D%20%7D7%5Ctimes5%5Ctimes8.5%20%5C%5C%20%20%5C%5C%20%3D297.5%20%5Cend%7Bgathered%7D)
The formula of density is:
![\text{ Density =}\frac{\text{ Mass}}{\text{ Volume}}](https://tex.z-dn.net/?f=%5Ctext%7B%20Density%20%3D%7D%5Cfrac%7B%5Ctext%7B%20%20Mass%7D%7D%7B%5Ctext%7B%20Volume%7D%7D)
So,
![\begin{gathered} 0.21=\frac{\text{ Weight of contents in container}}{\text{ Volume of container}} \\ \\ 0.21=\frac{\text{ Weight}}{297.5} \\ \\ 0.21\times297.5=\text{ Weight} \\ \\ \text{ Weight of contents in container = }62.475\text{ Pound} \end{gathered}](https://tex.z-dn.net/?f=%5Cbegin%7Bgathered%7D%200.21%3D%5Cfrac%7B%5Ctext%7B%20Weight%20%20of%20contents%20in%20container%7D%7D%7B%5Ctext%7B%20Volume%20of%20container%7D%7D%20%5C%5C%20%20%5C%5C%200.21%3D%5Cfrac%7B%5Ctext%7B%20Weight%7D%7D%7B297.5%7D%20%5C%5C%20%20%5C%5C%200.21%5Ctimes297.5%3D%5Ctext%7B%20Weight%7D%20%5C%5C%20%20%5C%5C%20%5Ctext%7B%20Weight%20of%20contents%20in%20container%20%3D%20%7D62.475%5Ctext%7B%20Pound%7D%20%5Cend%7Bgathered%7D)
Now $8.80 per pound
For 62.475 pounds the value is:
![\begin{gathered} =62.475\times8.80 \\ \\ =549.78 \end{gathered}](https://tex.z-dn.net/?f=%5Cbegin%7Bgathered%7D%20%3D62.475%5Ctimes8.80%20%5C%5C%20%20%5C%5C%20%3D549.78%20%5Cend%7Bgathered%7D)
So the value of the container contents is 549.78
Answer:
x = 4y+28
Step-by-step explanation:
x/4 -7 = y
Solve for x
Add 7 to each side
x/4 -7+7 = y+7
x/4 = (y+7)
Multiply each side by 4
x/4*4 = 4(y+7)
x = 4y+28