Answer:
20°
Step-by-step explanation:
According to the question, pair of supplementary angles are x and 8x
since they are supplementary, their sum is equal to 180°
x+ 8x = 180°
9x= 180°
x= 180°/9
x= 20°
Correct answer is going to be D
we have
------> equation ![1](https://tex.z-dn.net/?f=%201%20)
------> equation ![2](https://tex.z-dn.net/?f=%202%20)
Multiply by
the equation ![1](https://tex.z-dn.net/?f=%201%20)
------> equation ![3](https://tex.z-dn.net/?f=%203%20)
Sum equation
and equation ![3](https://tex.z-dn.net/?f=%203%20)
![4x+4y=28\\ 4x-4y=12\\ ------\\ 8x=40\\ x=40/8\\ x=5](https://tex.z-dn.net/?f=%204x%2B4y%3D28%5C%5C%204x-4y%3D12%5C%5C%20------%5C%5C%208x%3D40%5C%5C%20x%3D40%2F8%5C%5C%20x%3D5%20)
Substitute the value of x in the equation ![2](https://tex.z-dn.net/?f=%202%20)
![4*5+4y=28\\ 4y=28-20\\ 4y=8\\ y=8/4\\y=2](https://tex.z-dn.net/?f=%204%2A5%2B4y%3D28%5C%5C%204y%3D28-20%5C%5C%204y%3D8%5C%5C%20y%3D8%2F4%5C%5Cy%3D2%20%20)
therefore
the answer is the option B
![(5,2)](https://tex.z-dn.net/?f=%20%285%2C2%29%20)
Answer:
ITS 280
Step-by-step explanation:
Rounding - when you solve
27.8 x 9.6 = 266.88
thats nearest to 280
:) Have a great day