Evaluating Expressions

Identify the coefficient in the expression
4m + n + 2

• 2

• 4

• m

• n

How many terms are in the expression
3x + 2y + z

• 5

• 2

• 4

• 3

Identify the variables in the expression
3x +  9

• x

• y

• 9

• 3x

Evaluate 5x + 4y if x=3 and y=2

• 54

• 22

• 95

• 23

Evaluate the expression for x = 2.
4 − x

• 2

• 6

• −2

• −6

Write an algebraic expression for "12 more than number". 

• x + 12

• 12x

• x - 12

Write an algebraic expression for "8 less than a number".          

• 8x

• x - 8

• 8 - x

Evaluate 2r + 1

if r = 3

• 24

• 5

• 7

• 8

Evaluate 2a - b

if a = 6 and b = 1

• 12

• 25

• 11

• 13

Write an algebraic expression for "The product of seven and j".

• 7j

• j + 3

• j - 3

• j/3