Answer:
B 
Step-by-step explanation:
bssajshaiuegeihsjwiwuheiehajeiehauuwow
 
        
             
        
        
        
Answer:
f=ab/a+b
Step-by-step explanation:
Let's solve for f.
1/f=1/a+1/b
 
        
             
        
        
        
Answer:
Isosceles 
Step-by-step explanation:
Graph your triangle!
Then, do the distance formula. So from T to I is 5 units, R to I is 5 units, and T to R is 6 units. As two side lengths are congruent, the triangle is isosceles. 
Hope this helps!
 
        
             
        
        
        
The answer would be y=-4 and x=4, so pick which ever number/letter has this answer.