Who was the book The Civilizations of the Renaissance written for? What was the main idea of the book? Why is the book important?

The 13th century Italian literary revolution helped set the stage for the Renaissance. Prior to the Renaissance, the Italian language was not the literary language in Italy. It was only in the 13th century that Italian authors began writing in their native vernacular language rather than in Latin, French, or Provençal. The 1250s saw a major change in Italian poetry as the Dolce Stil Novo (Sweet New Style, which emphasized Platonic rather than courtly love) came into its own, pioneered by poets like Guittone d’Arezzo and Guido Guinizelli. Especially in poetry, major changes in Italian literature had been taking place decades before the Renaissance truly began.

With the printing of books initiated in Venice by Aldus Manutius, an increasing number of works began to be published in the Italian language, in addition to the flood of Latin and Greek texts that constituted the mainstream of the Italian Renaissance. The source for these works expanded beyond works of theology and towards the pre-Christian eras of Imperial Rome and Ancient Greece. This is not to say that no religious works were published in this period; Dante Alighieri’s The Divine Comedy reflects a distinctly medieval world view. Christianity remained a major influence for artists and authors, with the classics coming into their own as a second primary influence.

At Florence the most celebrated Humanists wrote also in the vulgar tongue, and commented on Dante and Petrarch and defended them from their enemies. Leone Battista Alberti, the learned Greek and Latin scholar, wrote in the vernacular, and Vespasiano da Bisticci, while he was constantly absorbed in Greek and Latin manuscripts, wrote the Vite di uomini illustri, valuable for their historical contents and rivaling the best works of the 14th century in their candor and simplicity.

Explanation:

the perimeter of a triangle is 69 cm. side a is 5 cm shorter than side b. side c is twice as long as side a. find the length of each side. i need to know how to do it in 2 equations.  

equations:

a = b-5

c = 2a

a + b + c = 69

that was the type of government the spanish colonists were used to.