Is there any notes to help solve this
Answer:
![\left[\begin{array}{ccc}7\\4\\2\end{array}\right]](https://tex.z-dn.net/?f=%5Cleft%5B%5Cbegin%7Barray%7D%7Bccc%7D7%5C%5C4%5C%5C2%5Cend%7Barray%7D%5Cright%5D)
Step-by-step explanation:
To find the product of two matrices we need to multiply the elements of each row of the first matrix by the elements of each column in the second matrix. Then we should add the products. Then:
×
=
= ![\left[\begin{array}{ccc}7\\4\\2\end{array}\right]](https://tex.z-dn.net/?f=%5Cleft%5B%5Cbegin%7Barray%7D%7Bccc%7D7%5C%5C4%5C%5C2%5Cend%7Barray%7D%5Cright%5D)
The term "x" refers to the multiplication sign.
Then, the solution is ![\left[\begin{array}{ccc}7\\4\\2\end{array}\right]](https://tex.z-dn.net/?f=%5Cleft%5B%5Cbegin%7Barray%7D%7Bccc%7D7%5C%5C4%5C%5C2%5Cend%7Barray%7D%5Cright%5D)
N=1/81 Look at the pic for more details and i got the pic from photomath
Answer:
he gained 900 dollars.
Step-by-step explanation:
Answer:
![x=-4](https://tex.z-dn.net/?f=x%3D-4)
Step-by-step explanation:
![9-4(2x-1)=45](https://tex.z-dn.net/?f=9-4%282x-1%29%3D45)
First, we expand the equation using the distributive rule:
![x(y-z)=xy-xz](https://tex.z-dn.net/?f=x%28y-z%29%3Dxy-xz)
Hence, ![9-4*2x-4*-1=45](https://tex.z-dn.net/?f=9-4%2A2x-4%2A-1%3D45)
Simplify: ![9-8x+4=45](https://tex.z-dn.net/?f=9-8x%2B4%3D45)
Add like terms:
![13-8x=45](https://tex.z-dn.net/?f=13-8x%3D45)
Subtract 13 from both sides: ![-8x=32](https://tex.z-dn.net/?f=-8x%3D32)
Divide both sides by -8:
![x=-4](https://tex.z-dn.net/?f=x%3D-4)