Answer:
A) -40
B) -16
C) 9
D) 30
E) -24
F) -135
G) -30
H) -36
I) 0
J) -5
K) 7
L) Undefined
Step-by-step explanation:
Let's calculate these expressions step by step:
A) (-5)(8) = -40
Explanation: Multiplying a negative number (-5) by a positive number (8) results in a negative product (-40).

B) (4)(-4) = -16
Explanation: Multiplying a positive number (4) by a negative number (-4) results in a negative product (-16).

C) (-1)(-9) = 9
Explanation: Multiplying two negative numbers (-1 and -9) results in a positive product (9).

D) (5)(6) = 30
Explanation: Multiplying two positive numbers (5 and 6) results in a positive product (30).

E) (12)(-2) = -24
Explanation: Multiplying a positive number (12) by a negative number (-2) results in a negative product (-24).

F) (-15)(9) = -135
Step-by-step explanation: Multiplying a negative number (-15) by a positive number (9) results in a negative product (-135).

G) (5)(-6) = -30
Explanation: Multiplying a positive number (5) by a negative number (-6) results in a negative product (-30).

H) 6(-6) = -36
Explanation: Multiplying a positive number (6) by a negative number (-6) results in a negative product (-36).

I) (-32)(0) = 0
Explanation: Multiplying any number by 0 results in 0.

J) (-15)/3 = -5
Step-by-step explanation: Dividing a negative number (-15) by a positive number (3) results in a negative quotient (-5).

K) (-28)/(-4) = 7
Explanation: Dividing a negative number (-28) by a negative number (-4) results in a positive quotient (7).

L) 25 / 0 = Undefined
Step-by-step explanation: Division by zero is undefined in mathematics. It is not possible to divide any number by zero.