Answer:
100
Step-by-step explanation:
Ratio is a fraction, so ratio of boys to girls would be written as [let boys be "b" and girls be "g"]:

Also, there are 250 more girls than boys, so we can write:
g = 250 + b
Lets substitute this into "g" of the ratio we wrote and cross mulitply and solve for b:

The number of boys = 100
 
        
             
        
        
        
Well what +8 will be -11.
Let’s take this as positives. 
8+11=19
Sooo
-19+8=-11
C=-19
        
                    
             
        
        
        
Answer:
3x³ + 12x
Step-by-step explanation:
Given
3x(x² + 4) ← multiply each term in the parenthesis by 3x
= 3x³ + 12x
 
        
             
        
        
        
Answer:
$-4
Step-by-step explanation:
Your welcome
 
        
                    
             
        
        
        
First, convert 5 and 24/10 into a mixed fraction:
5 and 24/10 = 74/10
Now, divide 74/10 by 4:
74/10 ÷ 4 = 74/10 × 1/4 
                = 74/40
                = 37/20
                = 1 and 17/20
(Remember that dividing requires you to reciprocate 4)
Hope this helps!