For a parallelogram, the area is calculated by the equation,
                                            A = bh
where A is area, b is base, and h is height. From this equation, we can solve for the base of the banner by dividing the area by the height. 
                        base of the banner = 127.5 cm² / 4.25 cm
                         base of the banner = 30 cm
Thus, the measure of the base of the banner is equal to 30 cm. 
        
             
        
        
        
This states that a number divided by 3 is 21. the equation is: n/3 = 21
        
             
        
        
        
3 (4x + 6) = 21
4x + 6 = 21/3
4x + 6 = 7
4x = 7 - 6
4x = 1
x = 1/4
        
             
        
        
        
Lets just convert them into improper fractions.
1) 4 and 1/12 = 49/12.
1 and 3/4 = 7/4.
2) 7/4 = 21/12
3) 21/12 + 49/12 = 70/12
Back to mixed fractions!
70/12 = 5 and 10/12 = 5 and 5/6
=5 5/6
⭐ Answered by Foxzy0⭐
⭐ Brainliest would be appreciated, I'm trying to reach genius! ⭐
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There is another method if you want to know. You can simply just do 4 + 1 = 5. Then do 1/12 + 3/4 = 10/12 = 5/6. So it goes to 5 5/6. Your choice which ever you find more eas.
 
        
                    
             
        
        
        
The answer is that the ratio of a to c is 9/5