Expressions and Substitutions

If a = 6 and b = 3, evaluate the following expression:

ab

• 63

• 18

• 9

• 216

If a = 6 and b = 3, evaluate the following expression:

a(-b)

• -18

• 18

• -63

• -9

If a = 6 and b = 3, evaluate the following expression:

a + b

• 18

• 63

• 3

• 9

If a = 6 and b = 3, evaluate the following expression:

-a + -b

• 63

• -9

• 18

• 216

If a = 6 and b = 3, evaluate the following expression:

• 1/2

• 2

• 36

• 12

If a = 6 and b = 3, evaluate the following expression:

• -2

• 2

• -1/2

• -23

If a = 5 and b= -10, evaluate the following expression:

• -1/2

• -2

• -510

• -15

If a = 5 and b= -10, evaluate the following expression:

• 1/2

• -1/2

• -2

• 2

If a = 5 and b= -10, evaluate the following expression:

a + b

• 15

• 5

• -5

• -15

If a = 5 and b= -10, evaluate the following expression:

-a + b

• -15

• -5

• 5

• -510