What operation extends this pattern? 100, 85, 70, a) add 15 b) subtract 15 c) multiply by 15 eliminate d) divide by 15

Hello! If you look at the pattern, 100 - 85 is 15, 85 - 70 is 15, and 70 - 55 is 15. You don't divide, because the numbers would be much smaller, or multiply, because the numbers would be much bigger. You would subtract 15 in order to get the next numbers. The answer is B.

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