Answer:
n=-6
Step-by-step explanation:
2n + 10 = -2
2n=-12
n=-6
Hope this helps!
If not I'm sorry.
Answer:
Step-by-step explanation:
area of a full circle is A = πr²
so a quarter of a circle area is A = πr²/4
A = 3.142(7²)/4
A = 38.4895 cm² picture answer
Using π = 3.14 results in
A = 3.14(7²)/4
A = 38.465 cm² written question answer
For comparison purposes,
Carrying the precision of π into many more significant digits results in
A = 38.484510006474...cm²
Answer:
Alright angle b, d, and f are congruent to the 70 degree angle, or in other words the same. Subtract 70 from 180 and you get 110 or the sum of each remaining angles degrees. So angles a, c, g, and e are all 110 degrees.
Answer:
y = 8
x = 9
Step-by-step explanation:
given equation,
x + y = 17 ........(1)
9 x - y = 73...........(2)
writing in matrix form
A X = B
![\begin{bmatrix}1 &1 \\ 9 &-1 \end{bmatrix} \begin{bmatrix}x\\ y\end{bmatrix}=\begin{bmatrix}17\\73 \end{bmatrix}](https://tex.z-dn.net/?f=%5Cbegin%7Bbmatrix%7D1%20%261%20%5C%5C%209%20%26-1%20%5Cend%7Bbmatrix%7D%20%5Cbegin%7Bbmatrix%7Dx%5C%5C%20y%5Cend%7Bbmatrix%7D%3D%5Cbegin%7Bbmatrix%7D17%5C%5C73%20%5Cend%7Bbmatrix%7D)
using augamented matrix A|B
![\begin{bmatrix}1 &1& 17\\ 9 & -1 & 73\end{bmatrix}](https://tex.z-dn.net/?f=%5Cbegin%7Bbmatrix%7D1%20%261%26%2017%5C%5C%209%20%26%20-1%20%26%2073%5Cend%7Bbmatrix%7D)
using row transformation
R₂ = R₂ - 9 R₁
![\begin{bmatrix}1 &1& 17\\ 0 & -10 & -80\end{bmatrix}](https://tex.z-dn.net/?f=%5Cbegin%7Bbmatrix%7D1%20%261%26%2017%5C%5C%200%20%26%20-10%20%26%20-80%5Cend%7Bbmatrix%7D)
now,
![\begin{bmatrix}1 &1 \\ 0 &-10 \end{bmatrix} \begin{bmatrix}x\\ y\end{bmatrix}=\begin{bmatrix}17\\-80 \end{bmatrix}](https://tex.z-dn.net/?f=%5Cbegin%7Bbmatrix%7D1%20%261%20%5C%5C%200%20%26-10%20%5Cend%7Bbmatrix%7D%20%5Cbegin%7Bbmatrix%7Dx%5C%5C%20y%5Cend%7Bbmatrix%7D%3D%5Cbegin%7Bbmatrix%7D17%5C%5C-80%20%5Cend%7Bbmatrix%7D)
now
-10 y = -80
y = 8
and
x + y = 17
x = 17 -8
x =9
Answer: 1.25664 or if you want in fraction form it's 2π/5
Step-by-step explanation:
To convert degrees to radians, multiply by π /180°
72° ⋅ π/180° = 72π/180 = 2π/5
Therefor, the answer is 2π/ 5 or in decimal form 1.25664.
* Hopefully this helps:) Mark me the brainliest:)
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