#### Transcript Lesson 1 Notes

**How to enter the room:**

1.

2.

3.

4.

5.

Greet Mrs. King at the door. A good class begins with mutual respect and recognition.

Retrieve a copy of the notes from the materials table.

Open your binder to the first section Write today’s date at the top (9/10/2014) Prepare to take notes

**Using Variables**

Algebra A Unit 1, Lesson 1

**Definition**

**Variable**

: a symbol, usually a letter, that represents one or more numbers.

**Definition**

**Algebraic expression**

: a mathematical phrase that can include numbers, variables, and operation symbols.

**Operation Words and Phrases**

+

*and*

**Practice:**

Write an algebraic expression for each phrase.

**a.**

the sum of

*n *

and 8 “Sum” means addition.

*n*

+ 8

**b.**

six less than

*b*

“Less than” means subtraction.

**CAREFUL of the order here!**

*b*

– 6

*.*

**Practice:**

Define a variable and write an algebraic expression for each phrase.

**a.**

“ten more than twice a number.” Define: Let

*y*

Write: = the number.

2

*y*

+ 10

**b.**

“three times a number minus six.” Define: Let

*n*

= the number.

Write:

*3n*

– 6

**Definition**

**Equation**

: a mathematical sentence that uses an equal sign.

What word or words from a sentence would indicate an equal sign?

**Practice: **

Write each sentence as an algebraic equation.

1.

A number increased by nine is fifteen.

2.

Twice a number is eighteen.

3.

Four less than a number is twenty.

**Practice: **

Write each sentence as an algebraic equation.

1.

Twice a number, decreased by twenty-nine, is seven.

2.

Thirty-two is twice a number increased by eight.

3.

The quotient of fifty and five more than a number is ten.

**At the end of the lesson:**

1.

2.

3.

Make sure your notes are secured in your binder in the notes section and

**in order.**

Pay attention for any special instructions regarding the homework.

Write your name and the date on the worksheet as soon as you receive a copy.

**Homework**

Practice 1-1 worksheet #1-20 (front and back of the worksheet)