Why does an increase in literacy rates often accompany an increase in per capita income?

people who have higher-paying jobs often have the time available to develop literacy skills.
developing countries have higher-than-average literacy rates, which typically leads to higher income.
people who can read and who receive an education are eligible for higher-paying jobs.
developed countries often attempt to raise low literacy rates to improve income.

People who can read and who receive an education are eligible for higher-paying jobs.

Explanation:

A population with a high level of education and literacy generates qualified people for jobs that pay a high salary and this generates an increase in income per capita.

However, a country with a high illiteracy rate and a precarious education, generates disqualified citizens for jobs that have a high salary. These people are subjected to unemployment, or precarious jobs with poor salaries and this generates a decrease in per capita income

alliances in ww1 were different from ww2 because the entente in ww1 made up of serbia,russia,france,britan,japan and italy later america  and all allied in a sort of balance of power and too keep germany,austria-hungary,and the ottomans down. russia allied the serbians in order to exert its influence in the balkans while france allied the russians because france was still in dismay and insulted after the defeat to the germans during the unification of germany and britian allied the belgians after the germans invasion of belgium.in ww2 the alliances were in a preemptive attempt to deter any further wars into happening while germany and italy allied since they were insulted and humiliated after the previous war while also sharing a similar ideology of facsim along with japan which all 3 had a want for world domination and agreed to assist one another in the endevours 

explanation:

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