135 degrees is your answer
        
             
        
        
        
Answer:
what is the question
Step-by-step explanation:
 
        
             
        
        
        
Use the pythagoream theorem to check. a^2+b^2=c^2
a=15 b=36 c= 39
225+1296=1521
The equation is true so it is a right triangle.
        
                    
             
        
        
        
Answer:
Your(my) number is 40
Step-by-step explanation:
I. Given 80/something, + 13, * 5 = 75 when x is something
So [   + 13 ]5 = 75
 + 13 ]5 = 75
      [  + 65] = 75
 + 65] = 75
       = 75 - 65
 = 75 - 65
       = 10
  = 10
      400 = 10x
          x = 40
II. Prove by replace 40 in x
     [(80/40) + 13]5 = 75
     [2 + 13] 5 = 75
     (15)5 = 75
         75 = 75 true
Ask me for anything.
 
        
             
        
        
        
Answer:
$7500
Step-by-step explanation:
$5000 was deposited 
5% annual interest of the $5000 is $250
so in ten years the interest will be 10 ×$250 =$2500
so the total sum that will be in the account is $5000 + $2500 =$7500