Answer:
The area of the wall that she will paint in two rolls is <u>219.8 inches²</u>.
Step-by-step explanation:
Given:
Jenny uses a roller to paint a wall. The roller has a radius of 1.75 inches and a height of 10 inches.
Now, to find the area of the wall that she will paint in two rolls.
So, we find the lateral surface area of roller.
Radius (r) = 1.75 inches.
Height (h) = 10 inches.
So, to get the lateral surface area we put formula:
![A_{L} =2\pi rh](https://tex.z-dn.net/?f=A_%7BL%7D%20%3D2%5Cpi%20rh)
![A_L=2\times 3.14\times 1.75\times 10](https://tex.z-dn.net/?f=A_L%3D2%5Ctimes%203.14%5Ctimes%201.75%5Ctimes%2010)
![A_L=109.9\ inches^2.](https://tex.z-dn.net/?f=A_L%3D109.9%5C%20inches%5E2.)
Thus, the lateral surface area of the roller = 109.9 inches².
Now, to get the area of wall that she will paint in two rolls we multiply 2 by the lateral surface area of the roller:
![109.9\times 2\\\\=219.8\ inches^2.](https://tex.z-dn.net/?f=109.9%5Ctimes%202%5C%5C%5C%5C%3D219.8%5C%20inches%5E2.)
Therefore, the area of the wall that she will paint in two rolls is 219.8 inches².
Because it was reflected across the x axis, the distance between the two points is twice the distance of the old point from the x axis, and the distance from the old point from the x axis equals the distance from the new point to the x axis. The distance from the x axis is the absolute value of the x=y value. 7.5 is the y value, meaning the point is 7.5 units away from y=0, the x axis. The new point is twice this from the old point. 7.5 x 2 = 15. The new point is 15 units away from the old point.
Answer:
(10/3, 2/3)
Step-by-step explanation:
You may find it easier to write these two equations x+y=4 2x-y=6 in a column:
x+y=4
2x-y=6
Adding these together will eliminate y:
3x = 10. Then x = 10/3.
Substituting 10/3 for x in the first equation results in:
10/3 + y = 4
Clear fractions by multiplying all three terms by 3:
10 + 3y = 12
Then 3y = 2, and y = 2/3.
The solution is (10/3, 2/3)
Answer:
20 I'm pretty sure it's right but if not sorry
Step-by-step explanation:
80x.2=16
16÷.8= 20