Answer: 
Step-by-step explanation:
Answer:
Step-by-step explanation:
[logical equivalence]
[morgan laws]
if
is true, then
is true and
is too.
with
true, then
is false [double denial]
In the first equivalence it follows that
is true [identity law]
Then it can be concluded that 
Answer:
20x + 20
Step-by-step explanation:
4 ( 2x + 3 ) + 4 ( 3x + 2 )
Take 4 common from both,
4 ( 2x + 3 + 3x + 2 )
= 4 ( 2x + 3x + 3 + 2 )
= 4 ( 5x + 5 )
= 4 ( 5x ) + 4 ( 5 )
= 20x + 20
Answer:
0.875
Step-by-step explanation: