Answer:
slope is undefined
Step-by-step explanation:
(a) The product of
is calculated to be 
(b)The product of
is not equal to the product of 
<u>Step-by-step explanation:</u>
<u>(a)</u>

b)

The product of
is not equal to the product of 
Answer:
option B is correct -7 is the answer
Step-by-step explanation:
=4⁴-3³.(12-3)-20
=256-27×(9)-20
=256-243-20
=256-263
=-7
hope it will help ^_^