Answer:
C) 4
Step-by-step explanation:
 
        
             
        
        
        
Answer:
Length: 13.9 inches
Step-by-step explanation:
a^2 + b^2 = c^2
a = 8 and c= 16
8^2 + b^2 = 16^2
64 + b^2 = 256
b^2 = 256 - 64
b = sqrt 192
b = 13.9
 
        
             
        
        
        
Answer:
Answer is D. 
30
Step-by-step explanation:
 all angles add up to 180(applys to triangles) 
 
        
             
        
        
        
Answer:
<em>It's</em><em> </em><em>answer</em><em> </em><em>is</em><em>:</em><em>-</em>
<em>d</em><em>.</em><em> </em><em>unfunded</em><em> </em><em>mandate</em>
<em>hope</em><em> </em><em>it</em><em> </em><em>will</em><em> </em><em>help</em><em> </em><em>you</em><em>.</em>
 
        
             
        
        
        
Answer:
Sixth graders: 14
Seventh graders: 28
Eighth graders: 28
Step-by-step explanation:
To solve this you just have to use a rule of three to solve the percentages, remember that the 100% will be the 70 students, and we solve each case separetly:
70 students= 100%
sixth grades=   40%
Sixth grades= (40*70)/100
Sixth graders= 28
70 students= 100%
seventh grades=   20%
seventh graders=   (20*70)/100
Seventh graders=14
So if we have that the rest of the students are eighth graders, we just add up the sixth and seventh graders and withdraw them from the total:
28+14=42
70-42=28
SOwe have that the eighth graders are 28