Two angels whose sides are opposite rays are called___ angles. Two coplanar angles with a common side, a common vertex, and no c
1 answer:
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Answer:
The answer is (b)
Step-by-step explanation:
* Lets check how to find the inverse of the matrix,
its dimensions is 2 × 2
* To know if the inverse of the matrix exist find the determinant
- If its not equal 0, then it exist
* How to find the determinant
- It is the difference between the multiplication of
the diagonals of the matrix
Ex: If the matrix is
its determinant = ad - bc
- After that lets swap the positions of a and d, put negatives
in front of b and c, and divide everything by the determinant
- The inverse will be
* Lets do that with our problem
∵ The determinant = (9 × 9) - (-2 × -10) = 81 - 20 = 61
- The determinant ≠ 0, then the inverse is exist
∴ The inverse is =
* The answer is (b)
Answer:
<u>310</u> tickets were sold in advance before school pay and <u>340</u> door tickets were sold in advance.
Step-by-step explanation:
Given:
Let number of tickets sold in advance be 'x'.
Cost of advance ticket = $3
Cost of door tickets = $5
Also given:
Thirty more tickets were sold at door in advance
Hence number of door tickets sold =
Total Money Collected = $2630
Now we can say that Total Money Collected is equal to sum of number of tickets sold in advance multiplied by Cost of advance ticket and number of door tickets sold multiplied by Cost of door tickets.
Framing in equation form we get;
Solving the equation to find the value of x we get;
Combining the like terms we get;
Now Dividing 8 on both side using division property we get;
Substituting the value of x to find number of door tickets been sold.
number of door tickets sold =
Hence, <u>310</u> tickets were sold in advance before school pay and <u>340</u> door tickets were sold in advance.
