Answer:
Johnny is wrong.

Step-by-step explanation:
Johnny is wrong.
A better definition would be:
is the set of all elements that belong to at least one A or B.
So, the elements that belong to both A and B, like c and d in this exercise, also belong to
.
So:

Answer:
step 2; a negative times a negative = a positive.
Step-by-step explanation:
-4(6-b)=4
<u>-24 </u><u>+</u><u>4b=4</u>
4b=28
b=7
Answer:
32
Step-by-step explanation:
From the given values
The possible logic could be
if x.y is given
then it is equal to
For 1st example
3.4
For 2nd example
2.5
⇒4.4
3yds or 5yds is the closest
Answer:
Step-by-step explanation: