Answer:
22 grams
Step-by-step explanation:
loses 50% of it's mass per 22 years
so after 22 years the mass would be 44 grams
22 years later would leave 50% of 44 grams = 22 grams
 
        
             
        
        
        
X=-3/5
    3
 - ---
    5
 X=-3/5 would be the answer
        
             
        
        
        
A is the best answer…
Work:
-10x-(-4y) will equal -10x+4y the minus minus will cancel out
Please like and brainiest
        
                    
             
        
        
        
Well, both sides are equal to 1, so I'm thinking "="
        
             
        
        
        
Answer:
- 4x² + 6xy - y²
Step-by-step explanation:
8x² + 3xy + 4y² - 12x² + 3xy - 5y² ← collect like terms
= (8x² - 12x² ) + (3xy + 3xy) + (4y² - 5y²)
= - 4x² + 6xy - y²