Intro to Algebra

Which of the following could NOT be a variable:

• x

• y

• 
• 3

Which of the following is an equation:

•  $3x$  

•  $4y\ +2$  

•  $5x\ +y$  

•  $2x\ =4$  

Which of the following is an expression:

• 4n+1=5

• $13+\ 2y$

• $3\ +\ x\ =7$

• $4x\ =y$

 $2n\ +1\ =5$  Identify the variable

• 2

• n

• 1

• 5

 $2n\ +1$  Identify the constant(s)

• 2

• n

• 1

• +

 $2n\ +1\ =5$  Identify the coefficient

• 2

• x

• 1

• 5

 $3m$  how many terms are present?

• 1

• 2

• 3

• 4

 $4b+5$  How many terms are present?

• 1

• 2

• 3

• 4

 $3y\ +2\ +7$ How many terms are present?

• 1

• 2

• 3

• 4

 $x\ +\ 2\ +6$  

Simplify the expression.