Point A before being rotated = (1,-2)
A point (x,y) is rotated counterclockwise by 90°. The result will be (-y,x)
If point (1,-2) rotated counterclockwise by 90°, the result will be (2,1)
ANSWER: A. (2,1)
Given:
Dimensions of a rectangular prism are 6 meters by 3 meters by 12 meters.
To find:
The surface area of the prism.
Solution:
The surface area of a rectangular prism is:
![A=2(lb+bh+hl)](https://tex.z-dn.net/?f=A%3D2%28lb%2Bbh%2Bhl%29)
Where, l is length, b is breadth and h is height.
Putting
, we get
![A=2(6\times 3+3\times 12+12\times 6)](https://tex.z-dn.net/?f=A%3D2%286%5Ctimes%203%2B3%5Ctimes%2012%2B12%5Ctimes%206%29)
![A=2(18+36+72)](https://tex.z-dn.net/?f=A%3D2%2818%2B36%2B72%29)
![A=2(126)](https://tex.z-dn.net/?f=A%3D2%28126%29)
![A=252](https://tex.z-dn.net/?f=A%3D252)
Therefore, the surface area of the prism is 252 square meters.
Answer:
B. 10
Step-by-step explanation:
To find the answer we would plug each given number into x to see if it makes the equation true
<em>A. 2(5) = 20 </em>
<em> 10 </em>
<em> 20</em>
<em>B. 2(10) = 20</em>
<em> 20 = 20</em>
<em>C. 2(20) = 20</em>
<em> 40 </em>
<em>20</em>
As you can see, the only answer that makes the equation 2x=20 true, is answer B
Answer:
41.090
Step-by-step explanation:
1 1 1 1
12.985
+
28.105
------------
4 1. 090