Answer: 18.75
Step-by-step explanation:There are 24 hours in a day. 4 hours 30 minutes is 4.50 hours. Which is equal to 18.75%.
Find the area of the room by multiplying the length by the width:
Area of room = 20 x 12 = 240 square feet.
Find the area of the tile: 2x 2 = 4 square feet.
To find the number of tiles divide the area of the room by the area of a tile:
240/4 = 60
They will need 60 tiles.
Answer:
<u>The rectangular array of data enclosed in large bracket [ ] or a round small ( ) bracket is called a matrix.</u>
According to order of matrix or value of elements, we can classify the matrices. Some of the types of matrices are as follows:
- Column Matrix
- Row matrix
- Square matrix
- Rectangular matrix
- Null matrix (zero matrix)
- diagonal matrix
- Unit matrix
- Scalar matrix
- Triangular matrix
- Symmetric matrix
- Skew-symmetric matrix
- Equal matrix
<h3>
Read more on:</h3>
brainly.com/question/16990997
Hope this helps.
Good luck on your assignment..
Answer:
(x,y)=(-11,2)
Step-by-step explanation:
x+2y=-7, -3x-5y=23; Matrix form:![A\left[\begin{array}{ccc}1&2\\-3&-5\end{array}\right] .X\left[\begin{array}{ccc}x\\y\end{array}\right] =B\left[\begin{array}{ccc}-7\\23\end{array}\right]; X=A^-1.B; If A=\left[\begin{array}{ccc}a&b\\c&d\end{array}\right] ; so\\ \\A^-1 =(1/(ad-bc))*\left[\begin{array}{ccc}d&-b\\-c&a\end{array}\right]; A^-1 =(1/-5+6)*\left[\begin{array}{ccc}-5&-2\\3&1\end{array}\right]=\left[\begin{array}{ccc}-5&-2\\3&1\end{array}\right] , we have: [tex]\left[\begin{array}{ccc}x\\y\end{array}\right] =\left[\begin{array}{ccc}-5&-2\\3&-1\end{array}\right] .\left[\begin{array}{ccc}-7\\23\end{array}\right]=\left[\begin{array}{ccc}-11\\2\end{array}\right]](https://tex.z-dn.net/?f=A%5Cleft%5B%5Cbegin%7Barray%7D%7Bccc%7D1%262%5C%5C-3%26-5%5Cend%7Barray%7D%5Cright%5D%20.X%5Cleft%5B%5Cbegin%7Barray%7D%7Bccc%7Dx%5C%5Cy%5Cend%7Barray%7D%5Cright%5D%20%3DB%5Cleft%5B%5Cbegin%7Barray%7D%7Bccc%7D-7%5C%5C23%5Cend%7Barray%7D%5Cright%5D%3B%20X%3DA%5E-1.B%3B%20If%20A%3D%5Cleft%5B%5Cbegin%7Barray%7D%7Bccc%7Da%26b%5C%5Cc%26d%5Cend%7Barray%7D%5Cright%5D%20%3B%20so%5C%5C%20%20%5C%5CA%5E-1%20%3D%281%2F%28ad-bc%29%29%2A%5Cleft%5B%5Cbegin%7Barray%7D%7Bccc%7Dd%26-b%5C%5C-c%26a%5Cend%7Barray%7D%5Cright%5D%3B%20A%5E-1%20%3D%281%2F-5%2B6%29%2A%5Cleft%5B%5Cbegin%7Barray%7D%7Bccc%7D-5%26-2%5C%5C3%261%5Cend%7Barray%7D%5Cright%5D%3D%5Cleft%5B%5Cbegin%7Barray%7D%7Bccc%7D-5%26-2%5C%5C3%261%5Cend%7Barray%7D%5Cright%5D%20%2C%20we%20%20have%3A%20%20%20%5Btex%5D%5Cleft%5B%5Cbegin%7Barray%7D%7Bccc%7Dx%5C%5Cy%5Cend%7Barray%7D%5Cright%5D%20%3D%5Cleft%5B%5Cbegin%7Barray%7D%7Bccc%7D-5%26-2%5C%5C3%26-1%5Cend%7Barray%7D%5Cright%5D%20.%5Cleft%5B%5Cbegin%7Barray%7D%7Bccc%7D-7%5C%5C23%5Cend%7Barray%7D%5Cright%5D%3D%5Cleft%5B%5Cbegin%7Barray%7D%7Bccc%7D-11%5C%5C2%5Cend%7Barray%7D%5Cright%5D)
; Finally (x,y) = (-11,2)
