Answer:
9.8
Step-by-step explanation:
1:49= ratio of carbon to to iron
1+49= steel
50=10pounds
49=?pounds
49 * 10/50
=49/5
=9.8pounds
 
        
             
        
        
        
Answer: this is so zenskinsta can have brainliest
Step-by-step explanation:
 
        
             
        
        
        
First - 8
second - 4
third - 12
fourth - 9
        
             
        
        
        
Answer:
62.5%
Step-by-step explanation:
We can write a proportion. We know that $50 is the original value and $80 is the marked up price. We don't know the marked up percentage. Let's call it x. We write equal ratios of  comparing percent and
 comparing percent and  comparing the 50 to the marked up price. We then set them equal.
 comparing the 50 to the marked up price. We then set them equal.

We then cross multiply across the equal sign from numerator to the opposite numerator.
80(x)=50(100)
80x=5000
We divide to find x.
x=62.5
This means the bicycles are marked up 62.5% and the original value is 37.5%.
 
        
             
        
        
        
Answer:
The answer is D 

That's the only equation will get us one point