Answer:
7/30
Step-by-step explanation:
We are given that Seven-ninths (7/9) of the pencils in a box are yellow and three-tenths (3/10) of the yellow pencils are sharpened.
To find the fraction that represents sharpened yellow pencils, we find the product of the the fraction of yellow pencils and the fraction of yellow pencils that are sharpened.
That is:
=> (7 / 9) * (3 / 10)
=(7 * 3) / (9 * 10)
= 21 / 90 
= 7 / 30
7/30 represents the fraction of sharpened yellow pencils. 
 
        
             
        
        
        
Answer:
392939939393939399393939393
Step-by-step explanation:
 
        
             
        
        
        
Answer:
8x^2+19x
Step-by-step explanation:
Simplify the expression by combining like terms. Terms which look a like and sound a like should be added together. 
3x^2+7x+3+5x^2+12x
x^2 terms: 3x^2+5x^2=8x^2
x terms: 7x+12x=19x
constants: 3
Together is is 8x^2+19x+3.
 
        
                    
             
        
        
        
0 would be the solution, no solution mans that the X is undefined, but here you are saying that X is equal to 0, therefore x is the solution.
TLDR; Your friend is wrong