I believe the answer is b.
Answer:
he used angry tone because he were angry
I believe the purpose of design is to make the documents more professional.
5+x
x represents the number, and "more than" indicates that it's addition.
Answer:
A marginal benefit is a maximum amount a consumer is willing to pay for an additional good or service. ... The marginal benefit for a consumer tends to decrease as consumption of the good or service increases. In the business world, the marginal benefit for producers is often referred to as marginal revenue.
Explanation:
