1 + (-5) becomes 1 - 5 because you are adding a negative number.
1 - 5 is -4
 
        
             
        
        
        
Answer: D
Step-by-step explanation:A scientist who studies the objects in the sky, including planets, galaxies, black holes, and stars, is called an astronomer
 
        
             
        
        
        
Answer:dk
Krk
Step-by-step explanation: