Solve the System by Using the Inverse of the Coefficient $$\begin{array} { l } x - 2 y + 3 z = 11 \\4 x + y - z = 4 \\2 x - y + 3 z = 10\end{array}$$

question 80

Multiple Choice

Solve the system by using the inverse of the coefficient matrix.
- $$\begin{array} { l } x - 2 y + 3 z = 11 \\4 x + y - z = 4 \\2 x - y + 3 z = 10\end{array}$$

• A) \(\{ ( 2,3,5 ) \}\)
• B) \(\{ ( 2 , - 3,1 ) \}\)
• C) \(\{ ( - 2 , - 3,3 ) \}\)
• D) \(\varnothing\)

Differentiate between elastic, inelastic, and unitary elastic demand based on graphical representations.

Explain the relationship between price changes, consumer expenditure, and total revenue.

Understand the concept of consumer surplus and how it can be affected by price changes.

Discuss income effects and substitution effects in the context of consumer choice.

---

Definitions:

Credit Sales

Sales made by a business where the payment is deferred to a later date, allowing the buyer to take possession of goods or services immediately but pay later.

Collect

To gather or amass something, often refers to the act of receiving payments or debts.

Depreciation Expense

The allocated cost of a tangible fixed asset over its useful life, reflecting its use and wear and tear over time.

Administrative Salaries

Expenses related to the salaries of employees who perform general administrative duties not directly tied to production or sales.