Answer:l
Step-by-step explanation:L
 
        
             
        
        
        
Answer:
x=# of boys
x+7=# of girls
x+x+7=25
2x+7=25
2x=25-7
2x=18
x=18/2
x=9 boys
x+7=16 girls
 
If you don't understand variables use trial and error.
 
Boys     Girls
1           8
2           9
3           10
4           11
5           12
6           13
7           14
8           15
9           16   9+16=25 students
 
You could start this way...
 
Boys     Girls
12        13
11        14
10        15
9          16     16 is 7 more than 9
 
        
             
        
        
        
Although there i no triangle given as the question requires, I am still going to answer because I understand it.
ABC is a right angled triangle. The triangle is 90° at C.
The trigonometric ratio sine is given by, sine = opposite/hypotenuse .
Cosine = adjacent/hypotenuse
 
So therefore, Sin A = 24/30
                               = 4/5
                     Cos A = 18/30
                               = 3/5
        
                    
             
        
        
        
Answer:
27
Step-by-step explanation:
22 + 6 = 28 - 1 = 27