Which of these is a primary source about the discovery of the New World? (4 points) a
A book written and researched by a noted historian

b
An article written by an archaeologist who excavated in the Caribbean

c
A journal written by Christopher Columbus on one of his voyages

d
A document sent to New World miners by a Spanish official

C

Explanation:

I'm pretty sure it's "A journal written by Christopher Columbus on one of his voyages because an example of a primary source would be a diary or a journal written by a general. About their life. About their experience. And this seems like a primary source to me.

simplify brackets

8 - 2a - 7 = a + 40

simplify 8 - 2a - 7 to -2a + 1

-2a + 1 = a + 40

add 2a to both sides

1 = a + 40 + 2a

simplify a + 40 + 2a to 3a + 40

1 = 3a + 40

subtract 40 from both sides

1 - 40 = 3a

simplify 1 - 40 o -39

-39 = 3a

divide both sides by 3

-39/3 = a

simplify 39/3 to 13

-13 = a

switch sides

a = -13

due to inefficiency of management, the business plan has failed

idk what right product means but i assume it's this one since this was the last one left after i did the other three

the finance team has misjudged the requirement of business plan and chosen a wrong line of credit

operations risk is when the employees make a mistake

flash floods have damaged all machinery in the main manufacturing

natural disasters include anything ruined in the business by the weather or other disasters such as earthquakes

there have been foreign exchange rate fluctuations

economic risks is when things in the economy changes (like interest rates, currency value). the government has a large part in controlling this