Answer:
An identity matrix, is a matrix that have '1' in the main diagonal. All of the other terms are '0'. When you multiply any matrix by the identity matrix, the result is the same matrix that you multiplied.
Example:
![\left[\begin{array}{ccc}1&0&0\\0&1&0\\0&0&1\end{array}\right]](https://tex.z-dn.net/?f=%5Cleft%5B%5Cbegin%7Barray%7D%7Bccc%7D1%260%260%5C%5C0%261%260%5C%5C0%260%261%5Cend%7Barray%7D%5Cright%5D)
In the set of the real number is the same that the application of identity property.
Every number multiplied by 1 es the same number.
Step-by-step explanation:
Let x be the width of the rectangle
Therefore length=3+x
Thus the formula to find the perimeter of the rectangle is:2(3+x+x)
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Answer:
7.5
Step-by-step explanation:
cause you can divide the 60 with the 8
Answer: 
Step-by-step explanation:
The average speed of the car is 40 miles per hour:

The car drives for 45 minutes:

Since 1 hours has 60 minutes, we can convert the time from minutes to hours:

Knowing these values, we can use the following formula for calculate the distace "d":

Therefore, substituting values into the formula, we get:
