Day 19 – September 21

Algebra: Chapter 2, Lesson 8, page 93.

Inverse of a Sum and Simplifying

The inverse of a SUM Property: For any rational numbers, `−(a+b)=−a+(−b)`. The additive inverse of a sum is the sum of the additive inverses.

In other words, if you have a `−` in front of a paranthesis, then just change the sign of EVERYTHING inside.

For example: `−(2a−7b−6)` becomes the opposite of each term, `−2a+7b+6`.

Another example: `3y-2-(2y-4)=3y-2-2y+4`. Combining like terms, we see the answer `=2y-4`

Two of tonight’s homework problems solved by MrE are here! Just click it!

Algebra 1a: Chapter 1, Lesson 9, page 40.

Using Formulas

See Day 11 – September 9 for Algebra

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