Answer is 161, i read minus -50 as subtracting the negative 50
Answer:
283 square inches
Step-by-step explanation:
Stacking 8 plates with height of each being 0.5 inch will form a cylinder with height 4 inches.
The radius of the cylinder is half the diameter
![r = \frac{10}{2} = 5in](https://tex.z-dn.net/?f=r%20%3D%20%20%5Cfrac%7B10%7D%7B2%7D%20%20%3D%205in)
The total surface area of this cylinder is:
![= 2\pi \: r(r + h)](https://tex.z-dn.net/?f=%20%3D%202%5Cpi%20%5C%3A%20r%28r%20%2B%20h%29)
We substitute the values to get:
![= 2 \times \pi \: \times 5(5+ 4) \\ = 10 \times 9\pi \\ = 90\pi \\ = 282.6 {in}^{2}](https://tex.z-dn.net/?f=%20%20%3D%202%20%5Ctimes%20%5Cpi%20%5C%3A%20%20%5Ctimes%205%285%2B%204%29%20%5C%5C%20%20%3D%2010%20%5Ctimes%209%5Cpi%20%5C%5C%20%20%3D%2090%5Cpi%20%5C%5C%20%20%3D%20282.6%20%7Bin%7D%5E%7B2%7D%20)
She will need approximately 283 square inches of wrapping
Answer:
Here
Step-by-step explanation:
length = x
width = 2x - 3
Perimeter = 2length + 2 width
2x + 2(2x - 3) = 42
2x + 4x - 6 =42
6x - 6 = 42
Add 6 to both sides
6x = 48
Divide both sides by 6
x = 8
Length = 8 inches
Width = 2(8) - 3 = 16-3 = 13 inches
The answer is 13x
Steps
Add 8+5
And then add the x next to 13
12
1/2 * x =6
6/ (1/2) = x
X=12