Evaluating Algebraic Expressions Giving a Variable

The number that is multiplied by the variable in an algebraic expression.

• term

• constant

• power

• coefficients

An expression that contains at least one variable.

• order of operations

• algebraic expression

• equivalent expressions

• evaluating 

Evaluate 2x + 5(y - 1) when x = 8 and y = 5

• 20

• 31

• 36

• -4

• 15

• 25

• 75

• 5

6c - 1 + 5c when c = 2

• 31

• 41

• 51

• 21

Evaluate the expression
when x=8 and y=12.
4x − 2y 

• 4(8) − 2(12)

• 0

• 8

• 4

A rectangle has a dimension that is represented by (2c + 1) and another dimension that is (3 + c). If c = 3, then that is the actual area of this rectangle?

• 13 square units

• 42 square units

• 36 square units

• 12 square units

If n = 4, what is the value of this expression? (5 + n)² ÷ 3

• 6

• 7

• 21

• 27

The length of a rectangle is represented by (5x - 3) and the width is (x + 3). If x = 2, then which of the following values is the actual perimeter of this rectangle?

• 18

• 14

• 24

• 20

A variable is a letter or symbol used to represent an unknown number.

• True

• False