Hey Jasmine812!
The Incas used khipu, the system of recording numbers by tying knots on strings! The numbers were indicated by knot type and position on the cord.
I hope this helps!
        
                    
             
        
        
        
Answer:
C) The teaching of evolution in public schools.
Explanation:
 
        
                    
             
        
        
        
Answer:
<h3>Ogden. Gibbons v. Ogden, (1824), U.S. Supreme Court case establishing the principle that states cannot, by legislative enactment, interfere with the power of Congress to regulate commerce.</h3><h3>Article I, Section 8, Clause 3: [The Congress shall have Power] To regulate Commerce with foreign Nations, and among the several States, and with the Indian Tribes; The significance of the Commerce Clause is described in the Supreme Court's opinion in Gonzales v. Raich, 545 U.S. 1</h3><h3>The Commerce Clause of the United States Constitution provides that the Congress shall have the power to regulate interstate and foreign commerce. The plain meaning of this language might indicate a limited power to regulate commercial trade between persons in one state and persons outside of that state</h3>
Explanation:
<h3>mark as brainliast</h3><h3>indian genius sarthak</h3>
 
        
             
        
        
        
Answer:
1. Missionary work  
2. The Avars turned against the Byzantines after initially helping them fight the Slavs.
Explanation:
1. Cyril and Methodius were brothers and were born in the 9th century, amidst the Constantine Empire. they became great missionaries, being recognized throughout the empire, mainly because of their strong teachings, since they received a quality education in Constantinople, masterfully mastering concepts such as philosophy, grammar, rhetoric, music, arithmetic, geography and astronomy, in addition to Greek and Latin.
2. The Avars were allies of the Byzantines during the battles against the Slavs, being very influential for the victory of the Byzantines and the strengthening of the empire, however after the change of rulers and in the midst of an economic crisis, they decided to turn against the Byzantines and collect very high fees that contributed to the overthrow of the empire.