Answer:
Step-by-step explanation:
Two negative signs equate to a positive sign, so we can write as just :
Add up similar terms:
Add 21 to both sides:
Subtract x from both sides:
Divide both sides by 4:
The answer is not defined.
Explanation:
The given matrix is
The matrix has dimensions
This means that the matrix has 2 rows and 2 columns.
Also, the matrix has dimensions
This means that the matrix has 2 rows and 1 column.
Since, the matrices can be added only if they have the same dimensions.
In other words, to add the matrices, the two matrices must have the same number of rows and same number of columns.
Since, the dimensions of the two matrices are not equal, the addition of these two matrices is not possible.
Hence, the addition of these two matrices is not defined.
For this case we must solve the following equation:
We follow the steps below:
Multiplying by 3 on both sides of the equation we have:
Subtracting 4 from both sides of the equation:
Thus, the solution of the equation is
Answer:
Answer:
r=8.66025403784
Step-by-step explanation:
7065=π(r squared)X30
7065=94.2(r squared)
7065÷94.2=r squared
√75=r squared
8.66025403784=r