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, ${\displaystyle -(a+b)=-a+(-b)}$. The additive inverse of a sum is the sum of the additive inverses.

In other words, if you have a ${\displaystyle -}$ in front of a paranthesis, then just change the sign of EVERYTHING inside.

For example: ${\displaystyle -(2a-7b-6)}$ becomes the opposite of each term, ${\displaystyle -2a+7b+6}$.

Another example: ${\displaystyle 3y-2-(2y-4)=3y-2-2y+4}$. Combining like terms, we see the answer ${\displaystyle =2y-4}$

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