Is it true that many civilizations took place in the Sahara and Sahel region of Africa in the past? if yes Mention Two civilizations which left a great impact and their achievements.

Trade routes emerged along which coast when arab and indian traders from around the indian ocean mixed with the bantu people from africa's interior? a. swahili coast b. guinea coast c. drakensberg coast d. namib coast

Ray lo bisects nlm, lm=18, no=4, and ln=10. what is the value of x?

Why is immigration so important today?