Answer:
Is D. having schools for religious study
Explanation:
The city of Timbuktu is known for being a trade center, having gold an salt mines, attracting many scholars, but isn't known for having schools for religious study.
The mention of Governor Faubus in Jackie Robinson’s letter to President Eisenhower strengthen the main argument of the letter is that "<span>The reference provides a real-life example of a pro-segregationist and his actions, making the need for civil rights more dire."</span>
Spanish colonies needed many workers because they needed to grow their crops, mine gold and silver, and work in their new cities. Spain wasn't able to have enough Spanish workers so they ended up taking Indians as their slaves, giving them very little food and water forcing thousands to die of starvation and overwork.
X+36=4x
x-x + 36= 4x-x
36=3x
36/3 = 3x/3
12 = x
Answer: x=12
I hope this helps!