The first equation
2x + 3y + 6z = 12
Using Venn probabilities, it is found that the probability that he receives an offer on at least one of the jobs is given by:
D. 0.80
<h3>What is a Venn probability?</h3>
In a Venn probability, two non-independent events are related with each other, as are their probabilities.
The "or probability" is given by:

In this problem, we have that:
- 50% chance of getting an offer on Job A, hence P(A) = 0.5.
- 60% chance of getting an offer on Job B, hence P(B) = 0.6.
- 30% chance of getting an offer on both jobs, hence
.
Then, the probability of getting an offer on at least one job is:

Hence option D is correct.
More can be learned about Venn probabilities at brainly.com/question/25698611
No is your answer
Assuming that b ≠ a, the answers will not be the same.
For example, (remembering that b ≠ a) let us assume that b = 10, a = 5
10 - 5 = 5
5 - 10 = -5
5 ≠ -5
So the commutative property of subtraction does not work unless in certain cases, in which a = b.
hope this helps
Can you please post the image.
<em>Answer:</em>
–6.8
<em>Method:</em>
Counting backwards from –7 to –6.5