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Home > MC1 > Chapter 9 > Lesson 9.3.1 > Problem 9-128

9-128.

Add x and y to get the sum. Multiply x and y to get the product.

Follow the pattern shown above right.

5 + y = 5 + a
What is y?

The product is 5a.

0.99 − 0.90 = 0.09