MATC606-W3(SY25-26_Term2)

Multiple Select

Which of the following are common uses of matrices in IT? Select all that apply.

• Databases: Tables of records

• Graphics: Pixel data on a screen

• Machine Learning: Data sets (Features vs Samples)

• Sorting algorithms

Multiple Choice

Which of the following best describes a matrix as introduced in the lesson?

• A rectangular array of numbers arranged in rows and columns

• A single row of numbers

• A list of unrelated values

• A circular arrangement of numbers

Multiple Choice

Based on the Sari-Sari Inventory example, what does each row and column in the matrix represent?

• Rows represent days, columns represent sales

• Rows represent branches, columns represent item types

• Rows represent prices, columns represent stores

• Rows represent item types, columns represent branches

Multiple Choice

How can matrices be used to represent network connectivity, as shown in the adjacency matrix example?

• By assigning random numbers to each route

• By listing all possible routes in a table

• By indicating direct routes between locations with 1s and 0s

• By drawing a map of the network

Multiple Choice

Which of the following is a necessary condition for adding or subtracting two matrices?

• Both matrices must be square matrices.

• Both matrices must have the same dimensions.

• Both matrices must contain only positive numbers.

• Both matrices must have the same elements.

Multiple Select

Which of the following real-world scenarios can be solved using scalar multiplication of matrices? Select all that apply.

• Applying a percentage discount to all prices in a list.

• Combining inventory counts from two warehouses.

• Converting all prices from USD to PHP.

• Calculating total sales from morning and afternoon shifts.

Fill in the Blank

Applying a 50% discount to an item priced at 8,000 using scalar multiplication results in a final price of ___.

Multiple Choice

Given Stock A = [10, 5] and Delivery B = [20, 10], what is the total stock after restocking using matrix addition?

• [30, 15]

• [20, 10]

• [10, 5]

• [25, 15]

Multiple Choice

How can vectors be used in real-life scenarios based on the examples given in the lesson?

• To represent velocity and force in physics, character positions in game development, and user records in data.

• To store only text data.

• To create images and videos.

• To organize books in a library.

Multiple Choice

Which of the following best describes a vector as introduced in the lesson?

• A list of unrelated numbers.

• A rectangular grid used to organize data.

• A single number representing a value.

• A matrix with only one row or one column, representing magnitude and direction.

Multiple Choice

Given the Quantity Vector Q = [2kg, 1L, 5pcs] and Price Vector P = [300, 80, 5], what operation would you perform to find the total cost of groceries?

• Dot Product (Multiplication)

• Addition

• Subtraction

• Division

Fill in the Blank

What is the resultant vector (net displacement) when a delivery rider moves 3km East, 2km North, then 1km East, and 4km South?

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