5/3/2004 Mathematics 7 Section 16VC - Act
1
- A four-digit number is to be made using the digits 1, 3, 5, and 8.
How many numbers can be made if all digits must be different?

Look, when you want to do something like put it like x^2. x2 could mean x² or x₂. so to clear confusion, know the notation. to find the product multiply the x's and you get -8x and the y's and you get 6y. since it's all being multiplied it is just -8x6y, or answer a. although the better answer is -48xy(combining -8 and 6) because you should multiply constants whenever you can.

The answer of the question is x=0 and y=