Alg2 - Before Unit 1 - What do you already know?

What is the coefficient of x?
8 + 5x - y

• 8
• 0
• 5
• -5

How many terms are in the expression?
-4 + 6y + 10x + 3a

• 4
• 3
• 5
• 2

A symbol for a number we don't know yet. This is usually a letter.

• coefficient
• sum
• variable
• term

An __________________  includes a combination of TERMS separated by at least 1 operator, Examples:  2x+7,       y–3, 7w+3,       8ab+9, 

• Constant
• Coefficient
• Term
• Expression

Combine like terms
3x + 2x + 3y - 7y

• 5x + 10y
• 5x + 4y
• 5x - 4y
• 5x -10y

a + a + a + a

• a + 4 
• 4a 
• a to the fourth power 
• 4a + 4 

12x ÷ 4y if x = -8 and y = 3

• -8

• 72

• -72

• 8

-7w² + 2w if w = -4

• 104

• -64

• -120

• 120

5(a + 6)

• 5a + 6
• a + 30
• 5a + 30
• 5a - 30

Simplify the expression:
4(5b - 6f - c)

• 20b - 24f - 4c
• 9b - 10f - 4c
• 45b - 46f - 4c
• 20b + 24f + 4c