Evaluating Algebraic Expressions with Rational Numbers

The numerical factor of a term that contains a variable.

In the expression 5x+4, 5 is one of these.

• coefficient

• variable

• constant

• term

Evaluate -5a if a = -4

• -20

• 20

• -9

• 9

Evaluate 9a if a = -3

• 27

• -27

• -3

• 3

Evaluate -b if b = 12

• 12

• -12

• 2

• 7

• 3

• 0

• -2

• 2

• 7

• 3

• 0

• -2

• 2

• 7

• 3

• 0

• -2

• -4

• 4

• -9

• 9

Evaluate a + (-b) if a = 15 and b = 6

• 21

• -9

• 9

• 80

Evaluate a + (-b) if a = -7 and b = -3

• -4

• -10

• 10

• 21