Answer:
this is the answer45x+134x
Answer
-13.875
Step-by-step explanation: I’m is not 100%
Answer:
∠ PTR = 140°
Step-by-step explanation:
∠ PTQ and ∠ RTS are vertical and congruent, thus
2x + 16 = x + 28 ( subtract x from both sides )
x + 16 = 28 ( subtract 16 from both sides
x = 12
Thus ∠PTQ = x + 28 = 12 + 28 = 40°
∠ PTQ and ∠ PTR are adjacent and supplementary, thus
∠ PTR = 180° - 40° = 140°
![A=\left[\begin{array}{ccc}3&-2\\4&-3\end{array}\right]](https://tex.z-dn.net/?f=A%3D%5Cleft%5B%5Cbegin%7Barray%7D%7Bccc%7D3%26-2%5C%5C4%26-3%5Cend%7Barray%7D%5Cright%5D)
We can find the A as shown below:
Given A^2=I
We know that A^2=A×A
And ![I=\left[\begin{array}{ccc}1&0\\0&1\end{array}\right]](https://tex.z-dn.net/?f=I%3D%5Cleft%5B%5Cbegin%7Barray%7D%7Bccc%7D1%260%5C%5C0%261%5Cend%7Barray%7D%5Cright%5D)
So, ![A^2=\left[\begin{array}{ccc}1&0\\0&1\end{array}\right]](https://tex.z-dn.net/?f=A%5E2%3D%5Cleft%5B%5Cbegin%7Barray%7D%7Bccc%7D1%260%5C%5C0%261%5Cend%7Barray%7D%5Cright%5D)
Let ![A=\left[\begin{array}{ccc}3&-2\\4&-3\end{array}\right]](https://tex.z-dn.net/?f=A%3D%5Cleft%5B%5Cbegin%7Barray%7D%7Bccc%7D3%26-2%5C%5C4%26-3%5Cend%7Barray%7D%5Cright%5D)
![A^2=\left[\begin{array}{ccc}3&-2\\4&-3\end{array}\right] \left[\begin{array}{ccc}3&-2\\4&-3\end{array}\right]](https://tex.z-dn.net/?f=A%5E2%3D%5Cleft%5B%5Cbegin%7Barray%7D%7Bccc%7D3%26-2%5C%5C4%26-3%5Cend%7Barray%7D%5Cright%5D%20%5Cleft%5B%5Cbegin%7Barray%7D%7Bccc%7D3%26-2%5C%5C4%26-3%5Cend%7Barray%7D%5Cright%5D)
![A^2=\left[\begin{array}{ccc}9-8&-6+6\\12-12&-8+9\end{array}\right]](https://tex.z-dn.net/?f=A%5E2%3D%5Cleft%5B%5Cbegin%7Barray%7D%7Bccc%7D9-8%26-6%2B6%5C%5C12-12%26-8%2B9%5Cend%7Barray%7D%5Cright%5D)
![A^2=\left[\begin{array}{ccc}1&0\\0&1\end{array}\right]](https://tex.z-dn.net/?f=A%5E2%3D%5Cleft%5B%5Cbegin%7Barray%7D%7Bccc%7D1%260%5C%5C0%261%5Cend%7Barray%7D%5Cright%5D)
Hence, ![A=\left[\begin{array}{ccc}3&-2\\4&-3\end{array}\right]](https://tex.z-dn.net/?f=A%3D%5Cleft%5B%5Cbegin%7Barray%7D%7Bccc%7D3%26-2%5C%5C4%26-3%5Cend%7Barray%7D%5Cright%5D)
Hence, option C is correct
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Disclaimer: Given question is incomplete. Complete question is attached.
Answer:
The bridge's height above the water is 130 feets.
Step-by-step explanation:
A rock is thrown upward from a bridge into a river below :

Here t is time in seconds
It is required to find the bridge's height above the water. When it reaches the height of the rock above the surface of the water, then :
h(t) = 0

So, the bridge's height above the water is 130 feets.